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Finding the Fourth Proportional to 721,348.62, 1,082,321 and 316,331.26

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Solution

The fourth proportional to 721,348.62, 1,082,321 and 316,331.26 is: 474,627.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,348.62 : 1,082,321 = 316,331.26 : x
  2. Step 2: Convert to fraction form
    721,348.62/1,082,321 = 316,331.26/x
  3. Step 3: Cross multiply
    721,348.62x = 1,082,321 × 316,331.26
  4. Step 4: Simplify right side
    721,348.62x = 342,371,965,654.46
  5. Step 5: Solve for x
    x = 342,371,965,654.46/721,348.62
  6. Step 6: Final answer
    x = 474,627.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.