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Finding the Fourth Proportional to 642,915.27, 887,233.28 and 352,553.26

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Solution

The fourth proportional to 642,915.27, 887,233.28 and 352,553.26 is: 486,529.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,915.27 : 887,233.28 = 352,553.26 : x
  2. Step 2: Convert to fraction form
    642,915.27/887,233.28 = 352,553.26/x
  3. Step 3: Cross multiply
    642,915.27x = 887,233.28 × 352,553.26
  4. Step 4: Simplify right side
    642,915.27x = 312,796,985,244.49
  5. Step 5: Solve for x
    x = 312,796,985,244.49/642,915.27
  6. Step 6: Final answer
    x = 486,529.10

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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.