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Finding the Fourth Proportional to 3,078.75, 4,248.18 and 1,734.20

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Solution

The fourth proportional to 3,078.75, 4,248.18 and 1,734.20 is: 2,392.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,078.75 : 4,248.18 = 1,734.20 : x
  2. Step 2: Convert to fraction form
    3,078.75/4,248.18 = 1,734.20/x
  3. Step 3: Cross multiply
    3,078.75x = 4,248.18 × 1,734.20
  4. Step 4: Simplify right side
    3,078.75x = 7,367,172.52
  5. Step 5: Solve for x
    x = 7,367,172.52/3,078.75
  6. Step 6: Final answer
    x = 2,392.91

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Half scale
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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.