Home / 1,520.32-2,279.76-789.16

Finding the Fourth Proportional to 1,520.32, 2,279.76 and 789.16

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Solution

The fourth proportional to 1,520.32, 2,279.76 and 789.16 is: 1,183.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,520.32 : 2,279.76 = 789.16 : x
  2. Step 2: Convert to fraction form
    1,520.32/2,279.76 = 789.16/x
  3. Step 3: Cross multiply
    1,520.32x = 2,279.76 × 789.16
  4. Step 4: Simplify right side
    1,520.32x = 1,799,095.40
  5. Step 5: Solve for x
    x = 1,799,095.40/1,520.32
  6. Step 6: Final answer
    x = 1,183.37

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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.