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Finding the Fourth Proportional to 347.86, 521.31 and 203.38

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Solution

The fourth proportional to 347.86, 521.31 and 203.38 is: 304.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    347.86 : 521.31 = 203.38 : x
  2. Step 2: Convert to fraction form
    347.86/521.31 = 203.38/x
  3. Step 3: Cross multiply
    347.86x = 521.31 × 203.38
  4. Step 4: Simplify right side
    347.86x = 106,024.03
  5. Step 5: Solve for x
    x = 106,024.03/347.86
  6. Step 6: Final answer
    x = 304.79

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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.