Home / 1,318.26-1,979.45-1,259.84

Finding the Fourth Proportional to 1,318.26, 1,979.45 and 1,259.84

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Solution

The fourth proportional to 1,318.26, 1,979.45 and 1,259.84 is: 1,891.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,318.26 : 1,979.45 = 1,259.84 : x
  2. Step 2: Convert to fraction form
    1,318.26/1,979.45 = 1,259.84/x
  3. Step 3: Cross multiply
    1,318.26x = 1,979.45 × 1,259.84
  4. Step 4: Simplify right side
    1,318.26x = 2,493,774.09
  5. Step 5: Solve for x
    x = 2,493,774.09/1,318.26
  6. Step 6: Final answer
    x = 1,891.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.