Home / 2,170.72-2,995.20-1,239.04

Finding the Fourth Proportional to 2,170.72, 2,995.20 and 1,239.04

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Solution

The fourth proportional to 2,170.72, 2,995.20 and 1,239.04 is: 1,709.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,170.72 : 2,995.20 = 1,239.04 : x
  2. Step 2: Convert to fraction form
    2,170.72/2,995.20 = 1,239.04/x
  3. Step 3: Cross multiply
    2,170.72x = 2,995.20 × 1,239.04
  4. Step 4: Simplify right side
    2,170.72x = 3,711,172.61
  5. Step 5: Solve for x
    x = 3,711,172.61/2,170.72
  6. Step 6: Final answer
    x = 1,709.65

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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.