Home / 1,680.13-2,318.16-1,249.12

Finding the Fourth Proportional to 1,680.13, 2,318.16 and 1,249.12

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Solution

The fourth proportional to 1,680.13, 2,318.16 and 1,249.12 is: 1,723.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,680.13 : 2,318.16 = 1,249.12 : x
  2. Step 2: Convert to fraction form
    1,680.13/2,318.16 = 1,249.12/x
  3. Step 3: Cross multiply
    1,680.13x = 2,318.16 × 1,249.12
  4. Step 4: Simplify right side
    1,680.13x = 2,895,660.02
  5. Step 5: Solve for x
    x = 2,895,660.02/1,680.13
  6. Step 6: Final answer
    x = 1,723.47

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Double scale
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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.