Home / 4,122.78-5,689.56-2,259.78

Finding the Fourth Proportional to 4,122.78, 5,689.56 and 2,259.78

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Solution

The fourth proportional to 4,122.78, 5,689.56 and 2,259.78 is: 3,118.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,122.78 : 5,689.56 = 2,259.78 : x
  2. Step 2: Convert to fraction form
    4,122.78/5,689.56 = 2,259.78/x
  3. Step 3: Cross multiply
    4,122.78x = 5,689.56 × 2,259.78
  4. Step 4: Simplify right side
    4,122.78x = 12,857,153.90
  5. Step 5: Solve for x
    x = 12,857,153.90/4,122.78
  6. Step 6: Final answer
    x = 3,118.56

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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.