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Finding the Fourth Proportional to 46.43, 69.65 and 31.23

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Solution

The fourth proportional to 46.43, 69.65 and 31.23 is: 46.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    46.43 : 69.65 = 31.23 : x
  2. Step 2: Convert to fraction form
    46.43/69.65 = 31.23/x
  3. Step 3: Cross multiply
    46.43x = 69.65 × 31.23
  4. Step 4: Simplify right side
    46.43x = 2,175.01
  5. Step 5: Solve for x
    x = 2,175.01/46.43
  6. Step 6: Final answer
    x = 46.85

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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.