Home / 2,720.27-4,079.90-1,239.15

Finding the Fourth Proportional to 2,720.27, 4,079.90 and 1,239.15

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Solution

The fourth proportional to 2,720.27, 4,079.90 and 1,239.15 is: 1,858.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,720.27 : 4,079.90 = 1,239.15 : x
  2. Step 2: Convert to fraction form
    2,720.27/4,079.90 = 1,239.15/x
  3. Step 3: Cross multiply
    2,720.27x = 4,079.90 × 1,239.15
  4. Step 4: Simplify right side
    2,720.27x = 5,055,603.53
  5. Step 5: Solve for x
    x = 5,055,603.53/2,720.27
  6. Step 6: Final answer
    x = 1,858.50

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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.