Home / 2,445.80-3,375.20-1,397.87

Finding the Fourth Proportional to 2,445.80, 3,375.20 and 1,397.87

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Solution

The fourth proportional to 2,445.80, 3,375.20 and 1,397.87 is: 1,929.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,445.80 : 3,375.20 = 1,397.87 : x
  2. Step 2: Convert to fraction form
    2,445.80/3,375.20 = 1,397.87/x
  3. Step 3: Cross multiply
    2,445.80x = 3,375.20 × 1,397.87
  4. Step 4: Simplify right side
    2,445.80x = 4,718,077.44
  5. Step 5: Solve for x
    x = 4,718,077.44/2,445.80
  6. Step 6: Final answer
    x = 1,929.05

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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.