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Finding the Fourth Proportional to 45.68, 62.99 and 31.84

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Solution

The fourth proportional to 45.68, 62.99 and 31.84 is: 43.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    45.68 : 62.99 = 31.84 : x
  2. Step 2: Convert to fraction form
    45.68/62.99 = 31.84/x
  3. Step 3: Cross multiply
    45.68x = 62.99 × 31.84
  4. Step 4: Simplify right side
    45.68x = 2,005.44
  5. Step 5: Solve for x
    x = 2,005.44/45.68
  6. Step 6: Final answer
    x = 43.90

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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.