Home / 3,712.80-5,122.08-2,455.20

Finding the Fourth Proportional to 3,712.80, 5,122.08 and 2,455.20

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Solution

The fourth proportional to 3,712.80, 5,122.08 and 2,455.20 is: 3,387.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,712.80 : 5,122.08 = 2,455.20 : x
  2. Step 2: Convert to fraction form
    3,712.80/5,122.08 = 2,455.20/x
  3. Step 3: Cross multiply
    3,712.80x = 5,122.08 × 2,455.20
  4. Step 4: Simplify right side
    3,712.80x = 12,575,730.82
  5. Step 5: Solve for x
    x = 12,575,730.82/3,712.80
  6. Step 6: Final answer
    x = 3,387.13

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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.