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Finding the Fourth Proportional to 344.56, 517.20 and 253.30

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Solution

The fourth proportional to 344.56, 517.20 and 253.30 is: 380.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    344.56 : 517.20 = 253.30 : x
  2. Step 2: Convert to fraction form
    344.56/517.20 = 253.30/x
  3. Step 3: Cross multiply
    344.56x = 517.20 × 253.30
  4. Step 4: Simplify right side
    344.56x = 131,006.76
  5. Step 5: Solve for x
    x = 131,006.76/344.56
  6. Step 6: Final answer
    x = 380.21

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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.