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Finding the Fourth Proportional to 815.26, 1,124.78 and 461.14

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Solution

The fourth proportional to 815.26, 1,124.78 and 461.14 is: 636.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    815.26 : 1,124.78 = 461.14 : x
  2. Step 2: Convert to fraction form
    815.26/1,124.78 = 461.14/x
  3. Step 3: Cross multiply
    815.26x = 1,124.78 × 461.14
  4. Step 4: Simplify right side
    815.26x = 518,681.05
  5. Step 5: Solve for x
    x = 518,681.05/815.26
  6. Step 6: Final answer
    x = 636.22

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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.