Home / 1,726.36-2,381.67-979.71

Finding the Fourth Proportional to 1,726.36, 2,381.67 and 979.71

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Solution

The fourth proportional to 1,726.36, 2,381.67 and 979.71 is: 1,351.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,726.36 : 2,381.67 = 979.71 : x
  2. Step 2: Convert to fraction form
    1,726.36/2,381.67 = 979.71/x
  3. Step 3: Cross multiply
    1,726.36x = 2,381.67 × 979.71
  4. Step 4: Simplify right side
    1,726.36x = 2,333,336.20
  5. Step 5: Solve for x
    x = 2,333,336.20/1,726.36
  6. Step 6: Final answer
    x = 1,351.59

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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.