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Finding the Fourth Proportional to 1,348.52, 1,861.26 and 824.90

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Solution

The fourth proportional to 1,348.52, 1,861.26 and 824.90 is: 1,138.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,348.52 : 1,861.26 = 824.90 : x
  2. Step 2: Convert to fraction form
    1,348.52/1,861.26 = 824.90/x
  3. Step 3: Cross multiply
    1,348.52x = 1,861.26 × 824.90
  4. Step 4: Simplify right side
    1,348.52x = 1,535,353.37
  5. Step 5: Solve for x
    x = 1,535,353.37/1,348.52
  6. Step 6: Final answer
    x = 1,138.55

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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.