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Finding the Fourth Proportional to 2,480.80, 3,721.04 and 837.20

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Solution

The fourth proportional to 2,480.80, 3,721.04 and 837.20 is: 1,255.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,480.80 : 3,721.04 = 837.20 : x
  2. Step 2: Convert to fraction form
    2,480.80/3,721.04 = 837.20/x
  3. Step 3: Cross multiply
    2,480.80x = 3,721.04 × 837.20
  4. Step 4: Simplify right side
    2,480.80x = 3,115,254.69
  5. Step 5: Solve for x
    x = 3,115,254.69/2,480.80
  6. Step 6: Final answer
    x = 1,255.75

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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.