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Finding the Fourth Proportional to 642,549, 886,737.06 and 356,042.28

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Solution

The fourth proportional to 642,549, 886,737.06 and 356,042.28 is: 491,349.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,549 : 886,737.06 = 356,042.28 : x
  2. Step 2: Convert to fraction form
    642,549/886,737.06 = 356,042.28/x
  3. Step 3: Cross multiply
    642,549x = 886,737.06 × 356,042.28
  4. Step 4: Simplify right side
    642,549x = 315,715,884,602.90
  5. Step 5: Solve for x
    x = 315,715,884,602.90/642,549
  6. Step 6: Final answer
    x = 491,349.12

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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.