Home / 2,809.11-3,880.80-2,393.78

Finding the Fourth Proportional to 2,809.11, 3,880.80 and 2,393.78

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Solution

The fourth proportional to 2,809.11, 3,880.80 and 2,393.78 is: 3,307.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,809.11 : 3,880.80 = 2,393.78 : x
  2. Step 2: Convert to fraction form
    2,809.11/3,880.80 = 2,393.78/x
  3. Step 3: Cross multiply
    2,809.11x = 3,880.80 × 2,393.78
  4. Step 4: Simplify right side
    2,809.11x = 9,289,781.42
  5. Step 5: Solve for x
    x = 9,289,781.42/2,809.11
  6. Step 6: Final answer
    x = 3,307.02

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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.