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Finding the Fourth Proportional to 356.32, 534.39 and 112.87

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Solution

The fourth proportional to 356.32, 534.39 and 112.87 is: 169.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    356.32 : 534.39 = 112.87 : x
  2. Step 2: Convert to fraction form
    356.32/534.39 = 112.87/x
  3. Step 3: Cross multiply
    356.32x = 534.39 × 112.87
  4. Step 4: Simplify right side
    356.32x = 60,316.60
  5. Step 5: Solve for x
    x = 60,316.60/356.32
  6. Step 6: Final answer
    x = 169.28

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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.