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Finding the Fourth Proportional to 62.56, 86.24 and 51.60

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Solution

The fourth proportional to 62.56, 86.24 and 51.60 is: 71.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    62.56 : 86.24 = 51.60 : x
  2. Step 2: Convert to fraction form
    62.56/86.24 = 51.60/x
  3. Step 3: Cross multiply
    62.56x = 86.24 × 51.60
  4. Step 4: Simplify right side
    62.56x = 4,449.98
  5. Step 5: Solve for x
    x = 4,449.98/62.56
  6. Step 6: Final answer
    x = 71.13

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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.