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Finding the Fourth Proportional to 617.68, 925.68 and 328.54

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Solution

The fourth proportional to 617.68, 925.68 and 328.54 is: 492.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    617.68 : 925.68 = 328.54 : x
  2. Step 2: Convert to fraction form
    617.68/925.68 = 328.54/x
  3. Step 3: Cross multiply
    617.68x = 925.68 × 328.54
  4. Step 4: Simplify right side
    617.68x = 304,122.91
  5. Step 5: Solve for x
    x = 304,122.91/617.68
  6. Step 6: Final answer
    x = 492.36

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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.