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Finding the Fourth Proportional to 62.80, 94.64 and 55.84

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Solution

The fourth proportional to 62.80, 94.64 and 55.84 is: 84.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    62.80 : 94.64 = 55.84 : x
  2. Step 2: Convert to fraction form
    62.80/94.64 = 55.84/x
  3. Step 3: Cross multiply
    62.80x = 94.64 × 55.84
  4. Step 4: Simplify right side
    62.80x = 5,284.70
  5. Step 5: Solve for x
    x = 5,284.70/62.80
  6. Step 6: Final answer
    x = 84.15

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.