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Finding the Fourth Proportional to 62.20, 92.75 and 56.80

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Solution

The fourth proportional to 62.20, 92.75 and 56.80 is: 84.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    62.20 : 92.75 = 56.80 : x
  2. Step 2: Convert to fraction form
    62.20/92.75 = 56.80/x
  3. Step 3: Cross multiply
    62.20x = 92.75 × 56.80
  4. Step 4: Simplify right side
    62.20x = 5,268.20
  5. Step 5: Solve for x
    x = 5,268.20/62.20
  6. Step 6: Final answer
    x = 84.70

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.