Home / 2,338.76-3,227.40-1,290.80

Finding the Fourth Proportional to 2,338.76, 3,227.40 and 1,290.80

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Solution

The fourth proportional to 2,338.76, 3,227.40 and 1,290.80 is: 1,781.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,338.76 : 3,227.40 = 1,290.80 : x
  2. Step 2: Convert to fraction form
    2,338.76/3,227.40 = 1,290.80/x
  3. Step 3: Cross multiply
    2,338.76x = 3,227.40 × 1,290.80
  4. Step 4: Simplify right side
    2,338.76x = 4,165,927.92
  5. Step 5: Solve for x
    x = 4,165,927.92/2,338.76
  6. Step 6: Final answer
    x = 1,781.25

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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.