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Finding the Fourth Proportional to 543.02, 815.08 and 422.60

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Solution

The fourth proportional to 543.02, 815.08 and 422.60 is: 634.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    543.02 : 815.08 = 422.60 : x
  2. Step 2: Convert to fraction form
    543.02/815.08 = 422.60/x
  3. Step 3: Cross multiply
    543.02x = 815.08 × 422.60
  4. Step 4: Simplify right side
    543.02x = 344,452.81
  5. Step 5: Solve for x
    x = 344,452.81/543.02
  6. Step 6: Final answer
    x = 634.33

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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.