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Finding the Fourth Proportional to 642,801.20, 887,006.04 and 356,296.92

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Solution

The fourth proportional to 642,801.20, 887,006.04 and 356,296.92 is: 491,656.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,801.20 : 887,006.04 = 356,296.92 : x
  2. Step 2: Convert to fraction form
    642,801.20/887,006.04 = 356,296.92/x
  3. Step 3: Cross multiply
    642,801.20x = 887,006.04 × 356,296.92
  4. Step 4: Simplify right side
    642,801.20x = 316,037,520,073.40
  5. Step 5: Solve for x
    x = 316,037,520,073.40/642,801.20
  6. Step 6: Final answer
    x = 491,656.71

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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.