Home / 2,799.20-3,862.56-1,557.12

Finding the Fourth Proportional to 2,799.20, 3,862.56 and 1,557.12

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Solution

The fourth proportional to 2,799.20, 3,862.56 and 1,557.12 is: 2,148.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,799.20 : 3,862.56 = 1,557.12 : x
  2. Step 2: Convert to fraction form
    2,799.20/3,862.56 = 1,557.12/x
  3. Step 3: Cross multiply
    2,799.20x = 3,862.56 × 1,557.12
  4. Step 4: Simplify right side
    2,799.20x = 6,014,469.43
  5. Step 5: Solve for x
    x = 6,014,469.43/2,799.20
  6. Step 6: Final answer
    x = 2,148.64

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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.