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Finding the Fourth Proportional to 55.87, 83.71 and 40.58

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Solution

The fourth proportional to 55.87, 83.71 and 40.58 is: 60.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    55.87 : 83.71 = 40.58 : x
  2. Step 2: Convert to fraction form
    55.87/83.71 = 40.58/x
  3. Step 3: Cross multiply
    55.87x = 83.71 × 40.58
  4. Step 4: Simplify right side
    55.87x = 3,396.90
  5. Step 5: Solve for x
    x = 3,396.90/55.87
  6. Step 6: Final answer
    x = 60.80

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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.