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Finding the Fourth Proportional to 924.72, 1,387.08 and 266.61

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Solution

The fourth proportional to 924.72, 1,387.08 and 266.61 is: 399.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    924.72 : 1,387.08 = 266.61 : x
  2. Step 2: Convert to fraction form
    924.72/1,387.08 = 266.61/x
  3. Step 3: Cross multiply
    924.72x = 1,387.08 × 266.61
  4. Step 4: Simplify right side
    924.72x = 369,809.40
  5. Step 5: Solve for x
    x = 369,809.40/924.72
  6. Step 6: Final answer
    x = 399.92

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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.