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Finding the Fourth Proportional to 45.34, 68.02 and 42.38

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Solution

The fourth proportional to 45.34, 68.02 and 42.38 is: 63.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    45.34 : 68.02 = 42.38 : x
  2. Step 2: Convert to fraction form
    45.34/68.02 = 42.38/x
  3. Step 3: Cross multiply
    45.34x = 68.02 × 42.38
  4. Step 4: Simplify right side
    45.34x = 2,882.69
  5. Step 5: Solve for x
    x = 2,882.69/45.34
  6. Step 6: Final answer
    x = 63.58

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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.