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Finding the Fourth Proportional to 62.22, 86.25 and 61.20

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Solution

The fourth proportional to 62.22, 86.25 and 61.20 is: 84.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    62.22 : 86.25 = 61.20 : x
  2. Step 2: Convert to fraction form
    62.22/86.25 = 61.20/x
  3. Step 3: Cross multiply
    62.22x = 86.25 × 61.20
  4. Step 4: Simplify right side
    62.22x = 5,278.50
  5. Step 5: Solve for x
    x = 5,278.50/62.22
  6. Step 6: Final answer
    x = 84.84

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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.