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Finding the Fourth Proportional to 543.16, 748.20 and 418.60

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Solution

The fourth proportional to 543.16, 748.20 and 418.60 is: 576.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    543.16 : 748.20 = 418.60 : x
  2. Step 2: Convert to fraction form
    543.16/748.20 = 418.60/x
  3. Step 3: Cross multiply
    543.16x = 748.20 × 418.60
  4. Step 4: Simplify right side
    543.16x = 313,196.52
  5. Step 5: Solve for x
    x = 313,196.52/543.16
  6. Step 6: Final answer
    x = 576.62

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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.