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Finding the Fourth Proportional to 924.72, 1,387.08 and 308.44

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Solution

The fourth proportional to 924.72, 1,387.08 and 308.44 is: 462.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    924.72 : 1,387.08 = 308.44 : x
  2. Step 2: Convert to fraction form
    924.72/1,387.08 = 308.44/x
  3. Step 3: Cross multiply
    924.72x = 1,387.08 × 308.44
  4. Step 4: Simplify right side
    924.72x = 427,830.96
  5. Step 5: Solve for x
    x = 427,830.96/924.72
  6. Step 6: Final answer
    x = 462.66

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1.5x scale

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.