Home / 1,290,239.34-1,780,575.95-709,506.78

Finding the Fourth Proportional to 1,290,239.34, 1,780,575.95 and 709,506.78

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Solution

The fourth proportional to 1,290,239.34, 1,780,575.95 and 709,506.78 is: 979,144.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,239.34 : 1,780,575.95 = 709,506.78 : x
  2. Step 2: Convert to fraction form
    1,290,239.34/1,780,575.95 = 709,506.78/x
  3. Step 3: Cross multiply
    1,290,239.34x = 1,780,575.95 × 709,506.78
  4. Step 4: Simplify right side
    1,290,239.34x = 1,263,330,708,829.94
  5. Step 5: Solve for x
    x = 1,263,330,708,829.94/1,290,239.34
  6. Step 6: Final answer
    x = 979,144.47

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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.