Home / 1,434.19-1,979.61-936.91

Finding the Fourth Proportional to 1,434.19, 1,979.61 and 936.91

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Solution

The fourth proportional to 1,434.19, 1,979.61 and 936.91 is: 1,293.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,434.19 : 1,979.61 = 936.91 : x
  2. Step 2: Convert to fraction form
    1,434.19/1,979.61 = 936.91/x
  3. Step 3: Cross multiply
    1,434.19x = 1,979.61 × 936.91
  4. Step 4: Simplify right side
    1,434.19x = 1,854,716.41
  5. Step 5: Solve for x
    x = 1,854,716.41/1,434.19
  6. Step 6: Final answer
    x = 1,293.22

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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.