Home / 3,177.25-4,385.40-2,116.78

Finding the Fourth Proportional to 3,177.25, 4,385.40 and 2,116.78

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Solution

The fourth proportional to 3,177.25, 4,385.40 and 2,116.78 is: 2,921.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,177.25 : 4,385.40 = 2,116.78 : x
  2. Step 2: Convert to fraction form
    3,177.25/4,385.40 = 2,116.78/x
  3. Step 3: Cross multiply
    3,177.25x = 4,385.40 × 2,116.78
  4. Step 4: Simplify right side
    3,177.25x = 9,282,927.01
  5. Step 5: Solve for x
    x = 9,282,927.01/3,177.25
  6. Step 6: Final answer
    x = 2,921.69

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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.