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Finding the Fourth Proportional to 62.29, 86.32 and 61.55

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Solution

The fourth proportional to 62.29, 86.32 and 61.55 is: 85.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    62.29 : 86.32 = 61.55 : x
  2. Step 2: Convert to fraction form
    62.29/86.32 = 61.55/x
  3. Step 3: Cross multiply
    62.29x = 86.32 × 61.55
  4. Step 4: Simplify right side
    62.29x = 5,313.00
  5. Step 5: Solve for x
    x = 5,313.00/62.29
  6. Step 6: Final answer
    x = 85.29

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.