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Finding the Fourth Proportional to 591.67, 887.55 and 431.29

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Solution

The fourth proportional to 591.67, 887.55 and 431.29 is: 646.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    591.67 : 887.55 = 431.29 : x
  2. Step 2: Convert to fraction form
    591.67/887.55 = 431.29/x
  3. Step 3: Cross multiply
    591.67x = 887.55 × 431.29
  4. Step 4: Simplify right side
    591.67x = 382,791.44
  5. Step 5: Solve for x
    x = 382,791.44/591.67
  6. Step 6: Final answer
    x = 646.97

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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.