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Finding the Fourth Proportional to 956.20, 1,318.83 and 823.65

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Solution

The fourth proportional to 956.20, 1,318.83 and 823.65 is: 1,136.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    956.20 : 1,318.83 = 823.65 : x
  2. Step 2: Convert to fraction form
    956.20/1,318.83 = 823.65/x
  3. Step 3: Cross multiply
    956.20x = 1,318.83 × 823.65
  4. Step 4: Simplify right side
    956.20x = 1,086,254.33
  5. Step 5: Solve for x
    x = 1,086,254.33/956.20
  6. Step 6: Final answer
    x = 1,136.01

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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.