Home / 1,520.28-2,279.18-871.46

Finding the Fourth Proportional to 1,520.28, 2,279.18 and 871.46

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Solution

The fourth proportional to 1,520.28, 2,279.18 and 871.46 is: 1,306.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,520.28 : 2,279.18 = 871.46 : x
  2. Step 2: Convert to fraction form
    1,520.28/2,279.18 = 871.46/x
  3. Step 3: Cross multiply
    1,520.28x = 2,279.18 × 871.46
  4. Step 4: Simplify right side
    1,520.28x = 1,986,214.20
  5. Step 5: Solve for x
    x = 1,986,214.20/1,520.28
  6. Step 6: Final answer
    x = 1,306.48

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1.5x scale

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.