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Finding the Fourth Proportional to 46.75, 69.74 and 42.87

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Solution

The fourth proportional to 46.75, 69.74 and 42.87 is: 63.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    46.75 : 69.74 = 42.87 : x
  2. Step 2: Convert to fraction form
    46.75/69.74 = 42.87/x
  3. Step 3: Cross multiply
    46.75x = 69.74 × 42.87
  4. Step 4: Simplify right side
    46.75x = 2,989.75
  5. Step 5: Solve for x
    x = 2,989.75/46.75
  6. Step 6: Final answer
    x = 63.95

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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.