Home / 2,178.88-3,006.84-1,247.38

Finding the Fourth Proportional to 2,178.88, 3,006.84 and 1,247.38

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Solution

The fourth proportional to 2,178.88, 3,006.84 and 1,247.38 is: 1,721.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,178.88 : 3,006.84 = 1,247.38 : x
  2. Step 2: Convert to fraction form
    2,178.88/3,006.84 = 1,247.38/x
  3. Step 3: Cross multiply
    2,178.88x = 3,006.84 × 1,247.38
  4. Step 4: Simplify right side
    2,178.88x = 3,750,672.08
  5. Step 5: Solve for x
    x = 3,750,672.08/2,178.88
  6. Step 6: Final answer
    x = 1,721.38

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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.