Home / 642,799.20-887,003.28-356,294.91

Finding the Fourth Proportional to 642,799.20, 887,003.28 and 356,294.91

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Solution

The fourth proportional to 642,799.20, 887,003.28 and 356,294.91 is: 491,653.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,799.20 : 887,003.28 = 356,294.91 : x
  2. Step 2: Convert to fraction form
    642,799.20/887,003.28 = 356,294.91/x
  3. Step 3: Cross multiply
    642,799.20x = 887,003.28 × 356,294.91
  4. Step 4: Simplify right side
    642,799.20x = 316,034,753,817.31
  5. Step 5: Solve for x
    x = 316,034,753,817.31/642,799.20
  6. Step 6: Final answer
    x = 491,653.93

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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.