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Finding the Fourth Proportional to 1,489.27, 2,234.02 and 393.63

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Solution

The fourth proportional to 1,489.27, 2,234.02 and 393.63 is: 590.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,489.27 : 2,234.02 = 393.63 : x
  2. Step 2: Convert to fraction form
    1,489.27/2,234.02 = 393.63/x
  3. Step 3: Cross multiply
    1,489.27x = 2,234.02 × 393.63
  4. Step 4: Simplify right side
    1,489.27x = 879,377.29
  5. Step 5: Solve for x
    x = 879,377.29/1,489.27
  6. Step 6: Final answer
    x = 590.48

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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.