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Finding the Fourth Proportional to 347.47, 521.11 and 103.99

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Solution

The fourth proportional to 347.47, 521.11 and 103.99 is: 155.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    347.47 : 521.11 = 103.99 : x
  2. Step 2: Convert to fraction form
    347.47/521.11 = 103.99/x
  3. Step 3: Cross multiply
    347.47x = 521.11 × 103.99
  4. Step 4: Simplify right side
    347.47x = 54,190.23
  5. Step 5: Solve for x
    x = 54,190.23/347.47
  6. Step 6: Final answer
    x = 155.96

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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.