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Finding the Fourth Proportional to 56.73, 85.15 and 40.53

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Solution

The fourth proportional to 56.73, 85.15 and 40.53 is: 60.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    56.73 : 85.15 = 40.53 : x
  2. Step 2: Convert to fraction form
    56.73/85.15 = 40.53/x
  3. Step 3: Cross multiply
    56.73x = 85.15 × 40.53
  4. Step 4: Simplify right side
    56.73x = 3,451.50
  5. Step 5: Solve for x
    x = 3,451.50/56.73
  6. Step 6: Final answer
    x = 60.84

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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.