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Finding the Fourth Proportional to 46.42, 63.98 and 39.94

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Solution

The fourth proportional to 46.42, 63.98 and 39.94 is: 55.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    46.42 : 63.98 = 39.94 : x
  2. Step 2: Convert to fraction form
    46.42/63.98 = 39.94/x
  3. Step 3: Cross multiply
    46.42x = 63.98 × 39.94
  4. Step 4: Simplify right side
    46.42x = 2,555.16
  5. Step 5: Solve for x
    x = 2,555.16/46.42
  6. Step 6: Final answer
    x = 55.04

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.