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Finding the Fourth Proportional to 347.88, 521.88 and 165.20

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Solution

The fourth proportional to 347.88, 521.88 and 165.20 is: 247.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    347.88 : 521.88 = 165.20 : x
  2. Step 2: Convert to fraction form
    347.88/521.88 = 165.20/x
  3. Step 3: Cross multiply
    347.88x = 521.88 × 165.20
  4. Step 4: Simplify right side
    347.88x = 86,214.58
  5. Step 5: Solve for x
    x = 86,214.58/347.88
  6. Step 6: Final answer
    x = 247.83

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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.