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Finding the Fourth Proportional to 974.54, 1,462.35 and 512.39

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Solution

The fourth proportional to 974.54, 1,462.35 and 512.39 is: 768.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    974.54 : 1,462.35 = 512.39 : x
  2. Step 2: Convert to fraction form
    974.54/1,462.35 = 512.39/x
  3. Step 3: Cross multiply
    974.54x = 1,462.35 × 512.39
  4. Step 4: Simplify right side
    974.54x = 749,293.52
  5. Step 5: Solve for x
    x = 749,293.52/974.54
  6. Step 6: Final answer
    x = 768.87

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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.