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Finding the Fourth Proportional to 45.11, 67.29 and 42.83

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Solution

The fourth proportional to 45.11, 67.29 and 42.83 is: 63.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    45.11 : 67.29 = 42.83 : x
  2. Step 2: Convert to fraction form
    45.11/67.29 = 42.83/x
  3. Step 3: Cross multiply
    45.11x = 67.29 × 42.83
  4. Step 4: Simplify right side
    45.11x = 2,881.85
  5. Step 5: Solve for x
    x = 2,881.85/45.11
  6. Step 6: Final answer
    x = 63.89

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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.