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Finding the Fourth Proportional to 62.60, 87.80 and 62.60

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Solution

The fourth proportional to 62.60, 87.80 and 62.60 is: 87.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    62.60 : 87.80 = 62.60 : x
  2. Step 2: Convert to fraction form
    62.60/87.80 = 62.60/x
  3. Step 3: Cross multiply
    62.60x = 87.80 × 62.60
  4. Step 4: Simplify right side
    62.60x = 5,496.28
  5. Step 5: Solve for x
    x = 5,496.28/62.60
  6. Step 6: Final answer
    x = 87.80

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.