Home / 3,121.55-4,309.51-2,490.05

Finding the Fourth Proportional to 3,121.55, 4,309.51 and 2,490.05

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Solution

The fourth proportional to 3,121.55, 4,309.51 and 2,490.05 is: 3,437.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.55 : 4,309.51 = 2,490.05 : x
  2. Step 2: Convert to fraction form
    3,121.55/4,309.51 = 2,490.05/x
  3. Step 3: Cross multiply
    3,121.55x = 4,309.51 × 2,490.05
  4. Step 4: Simplify right side
    3,121.55x = 10,730,873.83
  5. Step 5: Solve for x
    x = 10,730,873.83/3,121.55
  6. Step 6: Final answer
    x = 3,437.68

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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.