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Finding the Fourth Proportional to 56.78, 84.86 and 41.60

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Solution

The fourth proportional to 56.78, 84.86 and 41.60 is: 62.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    56.78 : 84.86 = 41.60 : x
  2. Step 2: Convert to fraction form
    56.78/84.86 = 41.60/x
  3. Step 3: Cross multiply
    56.78x = 84.86 × 41.60
  4. Step 4: Simplify right side
    56.78x = 3,529.97
  5. Step 5: Solve for x
    x = 3,529.97/56.78
  6. Step 6: Final answer
    x = 62.17

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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.