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Finding the Fourth Proportional to 54.66, 75.46 and 39.93

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Solution

The fourth proportional to 54.66, 75.46 and 39.93 is: 55.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    54.66 : 75.46 = 39.93 : x
  2. Step 2: Convert to fraction form
    54.66/75.46 = 39.93/x
  3. Step 3: Cross multiply
    54.66x = 75.46 × 39.93
  4. Step 4: Simplify right side
    54.66x = 3,013.12
  5. Step 5: Solve for x
    x = 3,013.12/54.66
  6. Step 6: Final answer
    x = 55.12

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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.