Home / 3,948.38-5,448.78-2,180.00

Finding the Fourth Proportional to 3,948.38, 5,448.78 and 2,180.00

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Solution

The fourth proportional to 3,948.38, 5,448.78 and 2,180.00 is: 3,008.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,948.38 : 5,448.78 = 2,180.00 : x
  2. Step 2: Convert to fraction form
    3,948.38/5,448.78 = 2,180.00/x
  3. Step 3: Cross multiply
    3,948.38x = 5,448.78 × 2,180.00
  4. Step 4: Simplify right side
    3,948.38x = 11,878,302.26
  5. Step 5: Solve for x
    x = 11,878,302.26/3,948.38
  6. Step 6: Final answer
    x = 3,008.40

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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.