Home / 2,255.19-3,387.65-1,909.20

Finding the Fourth Proportional to 2,255.19, 3,387.65 and 1,909.20

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Solution

The fourth proportional to 2,255.19, 3,387.65 and 1,909.20 is: 2,867.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,255.19 : 3,387.65 = 1,909.20 : x
  2. Step 2: Convert to fraction form
    2,255.19/3,387.65 = 1,909.20/x
  3. Step 3: Cross multiply
    2,255.19x = 3,387.65 × 1,909.20
  4. Step 4: Simplify right side
    2,255.19x = 6,467,701.38
  5. Step 5: Solve for x
    x = 6,467,701.38/2,255.19
  6. Step 6: Final answer
    x = 2,867.92

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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.