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Finding the Fourth Proportional to 347.39, 521.15 and 103.98

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Solution

The fourth proportional to 347.39, 521.15 and 103.98 is: 155.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    347.39 : 521.15 = 103.98 : x
  2. Step 2: Convert to fraction form
    347.39/521.15 = 103.98/x
  3. Step 3: Cross multiply
    347.39x = 521.15 × 103.98
  4. Step 4: Simplify right side
    347.39x = 54,188.66
  5. Step 5: Solve for x
    x = 54,188.66/347.39
  6. Step 6: Final answer
    x = 155.99

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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.