Home / 1,217.14-1,816.21-1,086.24

Finding the Fourth Proportional to 1,217.14, 1,816.21 and 1,086.24

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Solution

The fourth proportional to 1,217.14, 1,816.21 and 1,086.24 is: 1,620.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,217.14 : 1,816.21 = 1,086.24 : x
  2. Step 2: Convert to fraction form
    1,217.14/1,816.21 = 1,086.24/x
  3. Step 3: Cross multiply
    1,217.14x = 1,816.21 × 1,086.24
  4. Step 4: Simplify right side
    1,217.14x = 1,972,839.95
  5. Step 5: Solve for x
    x = 1,972,839.95/1,217.14
  6. Step 6: Final answer
    x = 1,620.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.