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Finding the Fourth Proportional to 617.55, 925.28 and 434.55

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Solution

The fourth proportional to 617.55, 925.28 and 434.55 is: 651.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    617.55 : 925.28 = 434.55 : x
  2. Step 2: Convert to fraction form
    617.55/925.28 = 434.55/x
  3. Step 3: Cross multiply
    617.55x = 925.28 × 434.55
  4. Step 4: Simplify right side
    617.55x = 402,083.35
  5. Step 5: Solve for x
    x = 402,083.35/617.55
  6. Step 6: Final answer
    x = 651.10

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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.