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Finding the Fourth Proportional to 924.87, 1,387.35 and 308.64

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Solution

The fourth proportional to 924.87, 1,387.35 and 308.64 is: 462.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    924.87 : 1,387.35 = 308.64 : x
  2. Step 2: Convert to fraction form
    924.87/1,387.35 = 308.64/x
  3. Step 3: Cross multiply
    924.87x = 1,387.35 × 308.64
  4. Step 4: Simplify right side
    924.87x = 428,191.70
  5. Step 5: Solve for x
    x = 428,191.70/924.87
  6. Step 6: Final answer
    x = 462.98

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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.