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Finding the Fourth Proportional to 674.97, 1,011.39 and 512.16

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Solution

The fourth proportional to 674.97, 1,011.39 and 512.16 is: 767.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    674.97 : 1,011.39 = 512.16 : x
  2. Step 2: Convert to fraction form
    674.97/1,011.39 = 512.16/x
  3. Step 3: Cross multiply
    674.97x = 1,011.39 × 512.16
  4. Step 4: Simplify right side
    674.97x = 517,987.79
  5. Step 5: Solve for x
    x = 517,987.79/674.97
  6. Step 6: Final answer
    x = 767.43

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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.