Home / 2,618.13-3,612.87-1,439.20

Finding the Fourth Proportional to 2,618.13, 3,612.87 and 1,439.20

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Solution

The fourth proportional to 2,618.13, 3,612.87 and 1,439.20 is: 1,986.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,618.13 : 3,612.87 = 1,439.20 : x
  2. Step 2: Convert to fraction form
    2,618.13/3,612.87 = 1,439.20/x
  3. Step 3: Cross multiply
    2,618.13x = 3,612.87 × 1,439.20
  4. Step 4: Simplify right side
    2,618.13x = 5,199,661.23
  5. Step 5: Solve for x
    x = 5,199,661.23/2,618.13
  6. Step 6: Final answer
    x = 1,986.02

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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.