Home / 2,809.25-3,875.30-2,278.75

Finding the Fourth Proportional to 2,809.25, 3,875.30 and 2,278.75

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Solution

The fourth proportional to 2,809.25, 3,875.30 and 2,278.75 is: 3,143.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,809.25 : 3,875.30 = 2,278.75 : x
  2. Step 2: Convert to fraction form
    2,809.25/3,875.30 = 2,278.75/x
  3. Step 3: Cross multiply
    2,809.25x = 3,875.30 × 2,278.75
  4. Step 4: Simplify right side
    2,809.25x = 8,830,839.88
  5. Step 5: Solve for x
    x = 8,830,839.88/2,809.25
  6. Step 6: Final answer
    x = 3,143.49

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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.