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Finding the Fourth Proportional to 2,720.16, 4,079.16 and 1,258.92

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Solution

The fourth proportional to 2,720.16, 4,079.16 and 1,258.92 is: 1,887.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,720.16 : 4,079.16 = 1,258.92 : x
  2. Step 2: Convert to fraction form
    2,720.16/4,079.16 = 1,258.92/x
  3. Step 3: Cross multiply
    2,720.16x = 4,079.16 × 1,258.92
  4. Step 4: Simplify right side
    2,720.16x = 5,135,336.11
  5. Step 5: Solve for x
    x = 5,135,336.11/2,720.16
  6. Step 6: Final answer
    x = 1,887.88

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1.5x scale

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.