Home / 1,006.22-1,391.18-961.67

Finding the Fourth Proportional to 1,006.22, 1,391.18 and 961.67

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Solution

The fourth proportional to 1,006.22, 1,391.18 and 961.67 is: 1,329.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,006.22 : 1,391.18 = 961.67 : x
  2. Step 2: Convert to fraction form
    1,006.22/1,391.18 = 961.67/x
  3. Step 3: Cross multiply
    1,006.22x = 1,391.18 × 961.67
  4. Step 4: Simplify right side
    1,006.22x = 1,337,854.74
  5. Step 5: Solve for x
    x = 1,337,854.74/1,006.22
  6. Step 6: Final answer
    x = 1,329.58

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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.