Home / 1,486.24-2,049.78-1,278.40

Finding the Fourth Proportional to 1,486.24, 2,049.78 and 1,278.40

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Solution

The fourth proportional to 1,486.24, 2,049.78 and 1,278.40 is: 1,763.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,486.24 : 2,049.78 = 1,278.40 : x
  2. Step 2: Convert to fraction form
    1,486.24/2,049.78 = 1,278.40/x
  3. Step 3: Cross multiply
    1,486.24x = 2,049.78 × 1,278.40
  4. Step 4: Simplify right side
    1,486.24x = 2,620,438.75
  5. Step 5: Solve for x
    x = 2,620,438.75/1,486.24
  6. Step 6: Final answer
    x = 1,763.13

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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.