Home / 1,520.20-2,279.40-545.86

Finding the Fourth Proportional to 1,520.20, 2,279.40 and 545.86

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Solution

The fourth proportional to 1,520.20, 2,279.40 and 545.86 is: 818.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,520.20 : 2,279.40 = 545.86 : x
  2. Step 2: Convert to fraction form
    1,520.20/2,279.40 = 545.86/x
  3. Step 3: Cross multiply
    1,520.20x = 2,279.40 × 545.86
  4. Step 4: Simplify right side
    1,520.20x = 1,244,233.28
  5. Step 5: Solve for x
    x = 1,244,233.28/1,520.20
  6. Step 6: Final answer
    x = 818.47

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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.