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Finding the Fourth Proportional to 815.35, 1,222.30 and 295.23

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Solution

The fourth proportional to 815.35, 1,222.30 and 295.23 is: 442.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    815.35 : 1,222.30 = 295.23 : x
  2. Step 2: Convert to fraction form
    815.35/1,222.30 = 295.23/x
  3. Step 3: Cross multiply
    815.35x = 1,222.30 × 295.23
  4. Step 4: Simplify right side
    815.35x = 360,858.89
  5. Step 5: Solve for x
    x = 360,858.89/815.35
  6. Step 6: Final answer
    x = 442.58

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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.