Home / 1,519.60-2,279.40-1,385.20

Finding the Fourth Proportional to 1,519.60, 2,279.40 and 1,385.20

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Solution

The fourth proportional to 1,519.60, 2,279.40 and 1,385.20 is: 2,077.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,519.60 : 2,279.40 = 1,385.20 : x
  2. Step 2: Convert to fraction form
    1,519.60/2,279.40 = 1,385.20/x
  3. Step 3: Cross multiply
    1,519.60x = 2,279.40 × 1,385.20
  4. Step 4: Simplify right side
    1,519.60x = 3,157,424.88
  5. Step 5: Solve for x
    x = 3,157,424.88/1,519.60
  6. Step 6: Final answer
    x = 2,077.80

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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.