Home / 1,383,142,689.72-1,908,782,438.49-756,596,779.56

Finding the Fourth Proportional to 1,383,142,689.72, 1,908,782,438.49 and 756,596,779.56

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Solution

The fourth proportional to 1,383,142,689.72, 1,908,782,438.49 and 756,596,779.56 is: 1,044,128,459.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,383,142,689.72 : 1,908,782,438.49 = 756,596,779.56 : x
  2. Step 2: Convert to fraction form
    1,383,142,689.72/1,908,782,438.49 = 756,596,779.56/x
  3. Step 3: Cross multiply
    1,383,142,689.72x = 1,908,782,438.49 × 756,596,779.56
  4. Step 4: Simplify right side
    1,383,142,689.72x = 1,444,178,645,842,217,728
  5. Step 5: Solve for x
    x = 1,444,178,645,842,217,728/1,383,142,689.72
  6. Step 6: Final answer
    x = 1,044,128,459.47

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Double scale
Find fourth proportional to 1,383,142,690.72, 1,908,782,439.87 and 756,596,780.56
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.