Home / 1,610.20-2,219.90-1,279.72

Finding the Fourth Proportional to 1,610.20, 2,219.90 and 1,279.72

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Solution

The fourth proportional to 1,610.20, 2,219.90 and 1,279.72 is: 1,764.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,610.20 : 2,219.90 = 1,279.72 : x
  2. Step 2: Convert to fraction form
    1,610.20/2,219.90 = 1,279.72/x
  3. Step 3: Cross multiply
    1,610.20x = 2,219.90 × 1,279.72
  4. Step 4: Simplify right side
    1,610.20x = 2,840,850.43
  5. Step 5: Solve for x
    x = 2,840,850.43/1,610.20
  6. Step 6: Final answer
    x = 1,764.28

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1.5x scale

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.