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Finding the Fourth Proportional to 543.30, 748.51 and 401.55

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Solution

The fourth proportional to 543.30, 748.51 and 401.55 is: 553.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    543.30 : 748.51 = 401.55 : x
  2. Step 2: Convert to fraction form
    543.30/748.51 = 401.55/x
  3. Step 3: Cross multiply
    543.30x = 748.51 × 401.55
  4. Step 4: Simplify right side
    543.30x = 300,558.44
  5. Step 5: Solve for x
    x = 300,558.44/543.30
  6. Step 6: Final answer
    x = 553.21

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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.