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Finding the Fourth Proportional to 823.02, 1,143.83 and 814.38

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Solution

The fourth proportional to 823.02, 1,143.83 and 814.38 is: 1,131.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    823.02 : 1,143.83 = 814.38 : x
  2. Step 2: Convert to fraction form
    823.02/1,143.83 = 814.38/x
  3. Step 3: Cross multiply
    823.02x = 1,143.83 × 814.38
  4. Step 4: Simplify right side
    823.02x = 931,508.20
  5. Step 5: Solve for x
    x = 931,508.20/823.02
  6. Step 6: Final answer
    x = 1,131.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.