Home / 3,161.40-4,360.80-2,278.38

Finding the Fourth Proportional to 3,161.40, 4,360.80 and 2,278.38

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Solution

The fourth proportional to 3,161.40, 4,360.80 and 2,278.38 is: 3,142.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,161.40 : 4,360.80 = 2,278.38 : x
  2. Step 2: Convert to fraction form
    3,161.40/4,360.80 = 2,278.38/x
  3. Step 3: Cross multiply
    3,161.40x = 4,360.80 × 2,278.38
  4. Step 4: Simplify right side
    3,161.40x = 9,935,559.50
  5. Step 5: Solve for x
    x = 9,935,559.50/3,161.40
  6. Step 6: Final answer
    x = 3,142.77

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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.