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Finding the Fourth Proportional to 60.55, 83.60 and 40.91

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Solution

The fourth proportional to 60.55, 83.60 and 40.91 is: 56.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    60.55 : 83.60 = 40.91 : x
  2. Step 2: Convert to fraction form
    60.55/83.60 = 40.91/x
  3. Step 3: Cross multiply
    60.55x = 83.60 × 40.91
  4. Step 4: Simplify right side
    60.55x = 3,420.08
  5. Step 5: Solve for x
    x = 3,420.08/60.55
  6. Step 6: Final answer
    x = 56.48

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.