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Finding the Fourth Proportional to 1,489.66, 2,234.48 and 379.08

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Solution

The fourth proportional to 1,489.66, 2,234.48 and 379.08 is: 568.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,489.66 : 2,234.48 = 379.08 : x
  2. Step 2: Convert to fraction form
    1,489.66/2,234.48 = 379.08/x
  3. Step 3: Cross multiply
    1,489.66x = 2,234.48 × 379.08
  4. Step 4: Simplify right side
    1,489.66x = 847,046.68
  5. Step 5: Solve for x
    x = 847,046.68/1,489.66
  6. Step 6: Final answer
    x = 568.62

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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.