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Finding the Fourth Proportional to 2,203.66, 3,302.50 and 815.65

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Solution

The fourth proportional to 2,203.66, 3,302.50 and 815.65 is: 1,222.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,203.66 : 3,302.50 = 815.65 : x
  2. Step 2: Convert to fraction form
    2,203.66/3,302.50 = 815.65/x
  3. Step 3: Cross multiply
    2,203.66x = 3,302.50 × 815.65
  4. Step 4: Simplify right side
    2,203.66x = 2,693,684.13
  5. Step 5: Solve for x
    x = 2,693,684.13/2,203.66
  6. Step 6: Final answer
    x = 1,222.37

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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.