Home / 1,126.26-1,686.48-817.85

Finding the Fourth Proportional to 1,126.26, 1,686.48 and 817.85

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Solution

The fourth proportional to 1,126.26, 1,686.48 and 817.85 is: 1,224.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,126.26 : 1,686.48 = 817.85 : x
  2. Step 2: Convert to fraction form
    1,126.26/1,686.48 = 817.85/x
  3. Step 3: Cross multiply
    1,126.26x = 1,686.48 × 817.85
  4. Step 4: Simplify right side
    1,126.26x = 1,379,287.67
  5. Step 5: Solve for x
    x = 1,379,287.67/1,126.26
  6. Step 6: Final answer
    x = 1,224.66

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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.