Home / 1,292.55-1,939.50-1,222.85

Finding the Fourth Proportional to 1,292.55, 1,939.50 and 1,222.85

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Solution

The fourth proportional to 1,292.55, 1,939.50 and 1,222.85 is: 1,834.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,292.55 : 1,939.50 = 1,222.85 : x
  2. Step 2: Convert to fraction form
    1,292.55/1,939.50 = 1,222.85/x
  3. Step 3: Cross multiply
    1,292.55x = 1,939.50 × 1,222.85
  4. Step 4: Simplify right side
    1,292.55x = 2,371,707.88
  5. Step 5: Solve for x
    x = 2,371,707.88/1,292.55
  6. Step 6: Final answer
    x = 1,834.91

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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.