Home / 420,666.40-627,780.11-375,789.16

Finding the Fourth Proportional to 420,666.40, 627,780.11 and 375,789.16

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Solution

The fourth proportional to 420,666.40, 627,780.11 and 375,789.16 is: 560,807.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,666.40 : 627,780.11 = 375,789.16 : x
  2. Step 2: Convert to fraction form
    420,666.40/627,780.11 = 375,789.16/x
  3. Step 3: Cross multiply
    420,666.40x = 627,780.11 × 375,789.16
  4. Step 4: Simplify right side
    420,666.40x = 235,912,960,201.61
  5. Step 5: Solve for x
    x = 235,912,960,201.61/420,666.40
  6. Step 6: Final answer
    x = 560,807.71

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.