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Finding the Fourth Proportional to 642,800.96, 887,051.20 and 356,318.56

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Solution

The fourth proportional to 642,800.96, 887,051.20 and 356,318.56 is: 491,711.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,800.96 : 887,051.20 = 356,318.56 : x
  2. Step 2: Convert to fraction form
    642,800.96/887,051.20 = 356,318.56/x
  3. Step 3: Cross multiply
    642,800.96x = 887,051.20 × 356,318.56
  4. Step 4: Simplify right side
    642,800.96x = 316,072,806,230.27
  5. Step 5: Solve for x
    x = 316,072,806,230.27/642,800.96
  6. Step 6: Final answer
    x = 491,711.78

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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.