Home / 2,086.13-3,129.20-718.13

Finding the Fourth Proportional to 2,086.13, 3,129.20 and 718.13

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Solution

The fourth proportional to 2,086.13, 3,129.20 and 718.13 is: 1,077.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,086.13 : 3,129.20 = 718.13 : x
  2. Step 2: Convert to fraction form
    2,086.13/3,129.20 = 718.13/x
  3. Step 3: Cross multiply
    2,086.13x = 3,129.20 × 718.13
  4. Step 4: Simplify right side
    2,086.13x = 2,247,172.40
  5. Step 5: Solve for x
    x = 2,247,172.40/2,086.13
  6. Step 6: Final answer
    x = 1,077.20

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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.