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Finding the Fourth Proportional to 892.38, 1,339.29 and 379.74

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Solution

The fourth proportional to 892.38, 1,339.29 and 379.74 is: 569.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    892.38 : 1,339.29 = 379.74 : x
  2. Step 2: Convert to fraction form
    892.38/1,339.29 = 379.74/x
  3. Step 3: Cross multiply
    892.38x = 1,339.29 × 379.74
  4. Step 4: Simplify right side
    892.38x = 508,581.98
  5. Step 5: Solve for x
    x = 508,581.98/892.38
  6. Step 6: Final answer
    x = 569.92

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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.