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Finding the Fourth Proportional to 152.85, 229.21 and 55.32

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Solution

The fourth proportional to 152.85, 229.21 and 55.32 is: 82.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    152.85 : 229.21 = 55.32 : x
  2. Step 2: Convert to fraction form
    152.85/229.21 = 55.32/x
  3. Step 3: Cross multiply
    152.85x = 229.21 × 55.32
  4. Step 4: Simplify right side
    152.85x = 12,679.90
  5. Step 5: Solve for x
    x = 12,679.90/152.85
  6. Step 6: Final answer
    x = 82.96

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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.