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Finding the Fourth Proportional to 815.11, 1,223.00 and 295.16

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Solution

The fourth proportional to 815.11, 1,223.00 and 295.16 is: 442.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    815.11 : 1,223.00 = 295.16 : x
  2. Step 2: Convert to fraction form
    815.11/1,223.00 = 295.16/x
  3. Step 3: Cross multiply
    815.11x = 1,223.00 × 295.16
  4. Step 4: Simplify right side
    815.11x = 360,975.03
  5. Step 5: Solve for x
    x = 360,975.03/815.11
  6. Step 6: Final answer
    x = 442.85

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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.