Home / 1,383,998.91-1,909,918.76-780,386.91

Finding the Fourth Proportional to 1,383,998.91, 1,909,918.76 and 780,386.91

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Solution

The fourth proportional to 1,383,998.91, 1,909,918.76 and 780,386.91 is: 1,076,934.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,383,998.91 : 1,909,918.76 = 780,386.91 : x
  2. Step 2: Convert to fraction form
    1,383,998.91/1,909,918.76 = 780,386.91/x
  3. Step 3: Cross multiply
    1,383,998.91x = 1,909,918.76 × 780,386.91
  4. Step 4: Simplify right side
    1,383,998.91x = 1,490,475,595,565.50
  5. Step 5: Solve for x
    x = 1,490,475,595,565.50/1,383,998.91
  6. Step 6: Final answer
    x = 1,076,934.08

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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.