Home / 3,385.40-5,079.36-1,439.12

Finding the Fourth Proportional to 3,385.40, 5,079.36 and 1,439.12

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Solution

The fourth proportional to 3,385.40, 5,079.36 and 1,439.12 is: 2,159.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,385.40 : 5,079.36 = 1,439.12 : x
  2. Step 2: Convert to fraction form
    3,385.40/5,079.36 = 1,439.12/x
  3. Step 3: Cross multiply
    3,385.40x = 5,079.36 × 1,439.12
  4. Step 4: Simplify right side
    3,385.40x = 7,309,808.56
  5. Step 5: Solve for x
    x = 7,309,808.56/3,385.40
  6. Step 6: Final answer
    x = 2,159.22

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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.