Home / 1,722.35-2,379.63-1,200.71

Finding the Fourth Proportional to 1,722.35, 2,379.63 and 1,200.71

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Solution

The fourth proportional to 1,722.35, 2,379.63 and 1,200.71 is: 1,658.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,722.35 : 2,379.63 = 1,200.71 : x
  2. Step 2: Convert to fraction form
    1,722.35/2,379.63 = 1,200.71/x
  3. Step 3: Cross multiply
    1,722.35x = 2,379.63 × 1,200.71
  4. Step 4: Simplify right side
    1,722.35x = 2,857,233.64
  5. Step 5: Solve for x
    x = 2,857,233.64/1,722.35
  6. Step 6: Final answer
    x = 1,658.92

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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.