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Finding the Fourth Proportional to 412.72, 569.24 and 387.52

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Solution

The fourth proportional to 412.72, 569.24 and 387.52 is: 534.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    412.72 : 569.24 = 387.52 : x
  2. Step 2: Convert to fraction form
    412.72/569.24 = 387.52/x
  3. Step 3: Cross multiply
    412.72x = 569.24 × 387.52
  4. Step 4: Simplify right side
    412.72x = 220,591.88
  5. Step 5: Solve for x
    x = 220,591.88/412.72
  6. Step 6: Final answer
    x = 534.48

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.