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Finding the Fourth Proportional to 354.72, 532.14 and 111.28

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Solution

The fourth proportional to 354.72, 532.14 and 111.28 is: 166.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    354.72 : 532.14 = 111.28 : x
  2. Step 2: Convert to fraction form
    354.72/532.14 = 111.28/x
  3. Step 3: Cross multiply
    354.72x = 532.14 × 111.28
  4. Step 4: Simplify right side
    354.72x = 59,216.54
  5. Step 5: Solve for x
    x = 59,216.54/354.72
  6. Step 6: Final answer
    x = 166.94

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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.