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Finding the Fourth Proportional to 883.10, 1,318.20 and 818.85

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Solution

The fourth proportional to 883.10, 1,318.20 and 818.85 is: 1,222.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    883.10 : 1,318.20 = 818.85 : x
  2. Step 2: Convert to fraction form
    883.10/1,318.20 = 818.85/x
  3. Step 3: Cross multiply
    883.10x = 1,318.20 × 818.85
  4. Step 4: Simplify right side
    883.10x = 1,079,409.94
  5. Step 5: Solve for x
    x = 1,079,409.94/883.10
  6. Step 6: Final answer
    x = 1,222.29

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.