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Finding the Fourth Proportional to 3,572.64, 4,930.20 and 2,080.80

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Solution

The fourth proportional to 3,572.64, 4,930.20 and 2,080.80 is: 2,871.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,572.64 : 4,930.20 = 2,080.80 : x
  2. Step 2: Convert to fraction form
    3,572.64/4,930.20 = 2,080.80/x
  3. Step 3: Cross multiply
    3,572.64x = 4,930.20 × 2,080.80
  4. Step 4: Simplify right side
    3,572.64x = 10,258,760.16
  5. Step 5: Solve for x
    x = 10,258,760.16/3,572.64
  6. Step 6: Final answer
    x = 2,871.48

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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.