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Finding the Fourth Proportional to 55.04, 82.36 and 40.56

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Solution

The fourth proportional to 55.04, 82.36 and 40.56 is: 60.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    55.04 : 82.36 = 40.56 : x
  2. Step 2: Convert to fraction form
    55.04/82.36 = 40.56/x
  3. Step 3: Cross multiply
    55.04x = 82.36 × 40.56
  4. Step 4: Simplify right side
    55.04x = 3,340.47
  5. Step 5: Solve for x
    x = 3,340.47/55.04
  6. Step 6: Final answer
    x = 60.69

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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.