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Finding the Fourth Proportional to 45.35, 67.91 and 38.89

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Solution

The fourth proportional to 45.35, 67.91 and 38.89 is: 58.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    45.35 : 67.91 = 38.89 : x
  2. Step 2: Convert to fraction form
    45.35/67.91 = 38.89/x
  3. Step 3: Cross multiply
    45.35x = 67.91 × 38.89
  4. Step 4: Simplify right side
    45.35x = 2,641.02
  5. Step 5: Solve for x
    x = 2,641.02/45.35
  6. Step 6: Final answer
    x = 58.24

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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.