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Finding the Fourth Proportional to 54.61, 75.26 and 38.21

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Solution

The fourth proportional to 54.61, 75.26 and 38.21 is: 52.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    54.61 : 75.26 = 38.21 : x
  2. Step 2: Convert to fraction form
    54.61/75.26 = 38.21/x
  3. Step 3: Cross multiply
    54.61x = 75.26 × 38.21
  4. Step 4: Simplify right side
    54.61x = 2,875.40
  5. Step 5: Solve for x
    x = 2,875.40/54.61
  6. Step 6: Final answer
    x = 52.66

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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.