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Finding the Fourth Proportional to 347.90, 521.89 and 104.42

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Solution

The fourth proportional to 347.90, 521.89 and 104.42 is: 156.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    347.90 : 521.89 = 104.42 : x
  2. Step 2: Convert to fraction form
    347.90/521.89 = 104.42/x
  3. Step 3: Cross multiply
    347.90x = 521.89 × 104.42
  4. Step 4: Simplify right side
    347.90x = 54,496.80
  5. Step 5: Solve for x
    x = 54,496.80/347.90
  6. Step 6: Final answer
    x = 156.65

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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.