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Finding the Fourth Proportional to 62.20, 93.34 and 57.74

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Solution

The fourth proportional to 62.20, 93.34 and 57.74 is: 86.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    62.20 : 93.34 = 57.74 : x
  2. Step 2: Convert to fraction form
    62.20/93.34 = 57.74/x
  3. Step 3: Cross multiply
    62.20x = 93.34 × 57.74
  4. Step 4: Simplify right side
    62.20x = 5,389.45
  5. Step 5: Solve for x
    x = 5,389.45/62.20
  6. Step 6: Final answer
    x = 86.65

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.