Home / 2,780.48-4,170.72-2,642.08

Finding the Fourth Proportional to 2,780.48, 4,170.72 and 2,642.08

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Solution

The fourth proportional to 2,780.48, 4,170.72 and 2,642.08 is: 3,963.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,780.48 : 4,170.72 = 2,642.08 : x
  2. Step 2: Convert to fraction form
    2,780.48/4,170.72 = 2,642.08/x
  3. Step 3: Cross multiply
    2,780.48x = 4,170.72 × 2,642.08
  4. Step 4: Simplify right side
    2,780.48x = 11,019,375.90
  5. Step 5: Solve for x
    x = 11,019,375.90/2,780.48
  6. Step 6: Final answer
    x = 3,963.12

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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.