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Finding the Fourth Proportional to 543.28, 749.56 and 346.72

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Solution

The fourth proportional to 543.28, 749.56 and 346.72 is: 478.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    543.28 : 749.56 = 346.72 : x
  2. Step 2: Convert to fraction form
    543.28/749.56 = 346.72/x
  3. Step 3: Cross multiply
    543.28x = 749.56 × 346.72
  4. Step 4: Simplify right side
    543.28x = 259,887.44
  5. Step 5: Solve for x
    x = 259,887.44/543.28
  6. Step 6: Final answer
    x = 478.37

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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.