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Finding the Fourth Proportional to 62.57, 86.36 and 36.70

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Solution

The fourth proportional to 62.57, 86.36 and 36.70 is: 50.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    62.57 : 86.36 = 36.70 : x
  2. Step 2: Convert to fraction form
    62.57/86.36 = 36.70/x
  3. Step 3: Cross multiply
    62.57x = 86.36 × 36.70
  4. Step 4: Simplify right side
    62.57x = 3,168.80
  5. Step 5: Solve for x
    x = 3,168.80/62.57
  6. Step 6: Final answer
    x = 50.64

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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.