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Finding the Fourth Proportional to 351.76, 528.72 and 344.20

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Solution

The fourth proportional to 351.76, 528.72 and 344.20 is: 517.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    351.76 : 528.72 = 344.20 : x
  2. Step 2: Convert to fraction form
    351.76/528.72 = 344.20/x
  3. Step 3: Cross multiply
    351.76x = 528.72 × 344.20
  4. Step 4: Simplify right side
    351.76x = 181,985.42
  5. Step 5: Solve for x
    x = 181,985.42/351.76
  6. Step 6: Final answer
    x = 517.36

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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.