Home / 1,217.27-1,679.25-1,170.12

Finding the Fourth Proportional to 1,217.27, 1,679.25 and 1,170.12

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Solution

The fourth proportional to 1,217.27, 1,679.25 and 1,170.12 is: 1,614.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,217.27 : 1,679.25 = 1,170.12 : x
  2. Step 2: Convert to fraction form
    1,217.27/1,679.25 = 1,170.12/x
  3. Step 3: Cross multiply
    1,217.27x = 1,679.25 × 1,170.12
  4. Step 4: Simplify right side
    1,217.27x = 1,964,924.01
  5. Step 5: Solve for x
    x = 1,964,924.01/1,217.27
  6. Step 6: Final answer
    x = 1,614.21

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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.