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Finding the Fourth Proportional to 617.81, 925.50 and 487.11

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Solution

The fourth proportional to 617.81, 925.50 and 487.11 is: 729.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    617.81 : 925.50 = 487.11 : x
  2. Step 2: Convert to fraction form
    617.81/925.50 = 487.11/x
  3. Step 3: Cross multiply
    617.81x = 925.50 × 487.11
  4. Step 4: Simplify right side
    617.81x = 450,820.31
  5. Step 5: Solve for x
    x = 450,820.31/617.81
  6. Step 6: Final answer
    x = 729.71

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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.