Home / 1,383.24-2,072.07-861.96

Finding the Fourth Proportional to 1,383.24, 2,072.07 and 861.96

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Solution

The fourth proportional to 1,383.24, 2,072.07 and 861.96 is: 1,291.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,383.24 : 2,072.07 = 861.96 : x
  2. Step 2: Convert to fraction form
    1,383.24/2,072.07 = 861.96/x
  3. Step 3: Cross multiply
    1,383.24x = 2,072.07 × 861.96
  4. Step 4: Simplify right side
    1,383.24x = 1,786,041.46
  5. Step 5: Solve for x
    x = 1,786,041.46/1,383.24
  6. Step 6: Final answer
    x = 1,291.20

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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.