Home / 3,948.39-5,448.79-2,179.99

Finding the Fourth Proportional to 3,948.39, 5,448.79 and 2,179.99

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Solution

The fourth proportional to 3,948.39, 5,448.79 and 2,179.99 is: 3,008.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,948.39 : 5,448.79 = 2,179.99 : x
  2. Step 2: Convert to fraction form
    3,948.39/5,448.79 = 2,179.99/x
  3. Step 3: Cross multiply
    3,948.39x = 5,448.79 × 2,179.99
  4. Step 4: Simplify right side
    3,948.39x = 11,878,317.25
  5. Step 5: Solve for x
    x = 11,878,317.25/3,948.39
  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.