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Finding the Fourth Proportional to 46.32, 69.18 and 42

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Solution

The fourth proportional to 46.32, 69.18 and 42 is: 62.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    46.32 : 69.18 = 42 : x
  2. Step 2: Convert to fraction form
    46.32/69.18 = 42/x
  3. Step 3: Cross multiply
    46.32x = 69.18 × 42
  4. Step 4: Simplify right side
    46.32x = 2,905.56
  5. Step 5: Solve for x
    x = 2,905.56/46.32
  6. Step 6: Final answer
    x = 62.73

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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.