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Finding the Fourth Proportional to 616.54, 924.80 and 445.28

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Solution

The fourth proportional to 616.54, 924.80 and 445.28 is: 667.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    616.54 : 924.80 = 445.28 : x
  2. Step 2: Convert to fraction form
    616.54/924.80 = 445.28/x
  3. Step 3: Cross multiply
    616.54x = 924.80 × 445.28
  4. Step 4: Simplify right side
    616.54x = 411,794.94
  5. Step 5: Solve for x
    x = 411,794.94/616.54
  6. Step 6: Final answer
    x = 667.91

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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.