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Finding the Fourth Proportional to 974.49, 1,462.65 and 512.61

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Solution

The fourth proportional to 974.49, 1,462.65 and 512.61 is: 769.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    974.49 : 1,462.65 = 512.61 : x
  2. Step 2: Convert to fraction form
    974.49/1,462.65 = 512.61/x
  3. Step 3: Cross multiply
    974.49x = 1,462.65 × 512.61
  4. Step 4: Simplify right side
    974.49x = 749,769.02
  5. Step 5: Solve for x
    x = 749,769.02/974.49
  6. Step 6: Final answer
    x = 769.40

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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.