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Finding the Fourth Proportional to 642,996.96, 887,385.96 and 356,572.86

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Solution

The fourth proportional to 642,996.96, 887,385.96 and 356,572.86 is: 492,098.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,996.96 : 887,385.96 = 356,572.86 : x
  2. Step 2: Convert to fraction form
    642,996.96/887,385.96 = 356,572.86/x
  3. Step 3: Cross multiply
    642,996.96x = 887,385.96 × 356,572.86
  4. Step 4: Simplify right side
    642,996.96x = 316,417,749,681.05
  5. Step 5: Solve for x
    x = 316,417,749,681.05/642,996.96
  6. Step 6: Final answer
    x = 492,098.36

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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.