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Finding the Fourth Proportional to 643,158.10, 887,500.02 and 356,677.30

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Solution

The fourth proportional to 643,158.10, 887,500.02 and 356,677.30 is: 492,182.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,158.10 : 887,500.02 = 356,677.30 : x
  2. Step 2: Convert to fraction form
    643,158.10/887,500.02 = 356,677.30/x
  3. Step 3: Cross multiply
    643,158.10x = 887,500.02 × 356,677.30
  4. Step 4: Simplify right side
    643,158.10x = 316,551,110,883.55
  5. Step 5: Solve for x
    x = 316,551,110,883.55/643,158.10
  6. Step 6: Final answer
    x = 492,182.42

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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.