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Finding the Fourth Proportional to 46.08, 69.24 and 39.12

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Solution

The fourth proportional to 46.08, 69.24 and 39.12 is: 58.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    46.08 : 69.24 = 39.12 : x
  2. Step 2: Convert to fraction form
    46.08/69.24 = 39.12/x
  3. Step 3: Cross multiply
    46.08x = 69.24 × 39.12
  4. Step 4: Simplify right side
    46.08x = 2,708.67
  5. Step 5: Solve for x
    x = 2,708.67/46.08
  6. Step 6: Final answer
    x = 58.78

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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.