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Finding the Fourth Proportional to 538.70, 808.80 and 344.90

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Solution

The fourth proportional to 538.70, 808.80 and 344.90 is: 517.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    538.70 : 808.80 = 344.90 : x
  2. Step 2: Convert to fraction form
    538.70/808.80 = 344.90/x
  3. Step 3: Cross multiply
    538.70x = 808.80 × 344.90
  4. Step 4: Simplify right side
    538.70x = 278,955.12
  5. Step 5: Solve for x
    x = 278,955.12/538.70
  6. Step 6: Final answer
    x = 517.83

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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.