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Finding the Fourth Proportional to 815.09, 1,124.87 and 461.04

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Solution

The fourth proportional to 815.09, 1,124.87 and 461.04 is: 636.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    815.09 : 1,124.87 = 461.04 : x
  2. Step 2: Convert to fraction form
    815.09/1,124.87 = 461.04/x
  3. Step 3: Cross multiply
    815.09x = 1,124.87 × 461.04
  4. Step 4: Simplify right side
    815.09x = 518,611.60
  5. Step 5: Solve for x
    x = 518,611.60/815.09
  6. Step 6: Final answer
    x = 636.27

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1.5x scale

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.