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Finding the Fourth Proportional to 40.69, 61.35 and 40.15

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Solution

The fourth proportional to 40.69, 61.35 and 40.15 is: 60.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    40.69 : 61.35 = 40.15 : x
  2. Step 2: Convert to fraction form
    40.69/61.35 = 40.15/x
  3. Step 3: Cross multiply
    40.69x = 61.35 × 40.15
  4. Step 4: Simplify right side
    40.69x = 2,463.00
  5. Step 5: Solve for x
    x = 2,463.00/40.69
  6. Step 6: Final answer
    x = 60.53

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.