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Finding the Fourth Proportional to 45.33, 67.75 and 38.95

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Solution

The fourth proportional to 45.33, 67.75 and 38.95 is: 58.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    45.33 : 67.75 = 38.95 : x
  2. Step 2: Convert to fraction form
    45.33/67.75 = 38.95/x
  3. Step 3: Cross multiply
    45.33x = 67.75 × 38.95
  4. Step 4: Simplify right side
    45.33x = 2,638.86
  5. Step 5: Solve for x
    x = 2,638.86/45.33
  6. Step 6: Final answer
    x = 58.21

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.