Home / 2,278.79-3,143.27-1,438.01

Finding the Fourth Proportional to 2,278.79, 3,143.27 and 1,438.01

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Solution

The fourth proportional to 2,278.79, 3,143.27 and 1,438.01 is: 1,983.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,278.79 : 3,143.27 = 1,438.01 : x
  2. Step 2: Convert to fraction form
    2,278.79/3,143.27 = 1,438.01/x
  3. Step 3: Cross multiply
    2,278.79x = 3,143.27 × 1,438.01
  4. Step 4: Simplify right side
    2,278.79x = 4,520,042.24
  5. Step 5: Solve for x
    x = 4,520,042.24/2,278.79
  6. Step 6: Final answer
    x = 1,983.53

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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.