Home / 3,145.88-4,341.38-1,801.78

Finding the Fourth Proportional to 3,145.88, 4,341.38 and 1,801.78

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Solution

The fourth proportional to 3,145.88, 4,341.38 and 1,801.78 is: 2,486.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,145.88 : 4,341.38 = 1,801.78 : x
  2. Step 2: Convert to fraction form
    3,145.88/4,341.38 = 1,801.78/x
  3. Step 3: Cross multiply
    3,145.88x = 4,341.38 × 1,801.78
  4. Step 4: Simplify right side
    3,145.88x = 7,822,191.79
  5. Step 5: Solve for x
    x = 7,822,191.79/3,145.88
  6. Step 6: Final answer
    x = 2,486.49

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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.