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Finding the Fourth Proportional to 617.67, 925.59 and 487.98

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Solution

The fourth proportional to 617.67, 925.59 and 487.98 is: 731.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    617.67 : 925.59 = 487.98 : x
  2. Step 2: Convert to fraction form
    617.67/925.59 = 487.98/x
  3. Step 3: Cross multiply
    617.67x = 925.59 × 487.98
  4. Step 4: Simplify right side
    617.67x = 451,669.41
  5. Step 5: Solve for x
    x = 451,669.41/617.67
  6. Step 6: Final answer
    x = 731.25

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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.