Home / 1,520.27-2,279.19-871.46

Finding the Fourth Proportional to 1,520.27, 2,279.19 and 871.46

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Solution

The fourth proportional to 1,520.27, 2,279.19 and 871.46 is: 1,306.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,520.27 : 2,279.19 = 871.46 : x
  2. Step 2: Convert to fraction form
    1,520.27/2,279.19 = 871.46/x
  3. Step 3: Cross multiply
    1,520.27x = 2,279.19 × 871.46
  4. Step 4: Simplify right side
    1,520.27x = 1,986,222.92
  5. Step 5: Solve for x
    x = 1,986,222.92/1,520.27
  6. Step 6: Final answer
    x = 1,306.49

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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.