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Finding the Fourth Proportional to 617.56, 926.20 and 397.87

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Solution

The fourth proportional to 617.56, 926.20 and 397.87 is: 596.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    617.56 : 926.20 = 397.87 : x
  2. Step 2: Convert to fraction form
    617.56/926.20 = 397.87/x
  3. Step 3: Cross multiply
    617.56x = 926.20 × 397.87
  4. Step 4: Simplify right side
    617.56x = 368,507.19
  5. Step 5: Solve for x
    x = 368,507.19/617.56
  6. Step 6: Final answer
    x = 596.71

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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.