Home / 2,278.90-3,146.75-1,440.96

Finding the Fourth Proportional to 2,278.90, 3,146.75 and 1,440.96

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Solution

The fourth proportional to 2,278.90, 3,146.75 and 1,440.96 is: 1,989.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,278.90 : 3,146.75 = 1,440.96 : x
  2. Step 2: Convert to fraction form
    2,278.90/3,146.75 = 1,440.96/x
  3. Step 3: Cross multiply
    2,278.90x = 3,146.75 × 1,440.96
  4. Step 4: Simplify right side
    2,278.90x = 4,534,340.88
  5. Step 5: Solve for x
    x = 4,534,340.88/2,278.90
  6. Step 6: Final answer
    x = 1,989.71

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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.