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Finding the Fourth Proportional to 347.80, 521.22 and 165.10

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Solution

The fourth proportional to 347.80, 521.22 and 165.10 is: 247.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    347.80 : 521.22 = 165.10 : x
  2. Step 2: Convert to fraction form
    347.80/521.22 = 165.10/x
  3. Step 3: Cross multiply
    347.80x = 521.22 × 165.10
  4. Step 4: Simplify right side
    347.80x = 86,053.42
  5. Step 5: Solve for x
    x = 86,053.42/347.80
  6. Step 6: Final answer
    x = 247.42

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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.