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Finding the Fourth Proportional to 345.08, 517.69 and 113.98

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Solution

The fourth proportional to 345.08, 517.69 and 113.98 is: 170.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    345.08 : 517.69 = 113.98 : x
  2. Step 2: Convert to fraction form
    345.08/517.69 = 113.98/x
  3. Step 3: Cross multiply
    345.08x = 517.69 × 113.98
  4. Step 4: Simplify right side
    345.08x = 59,006.67
  5. Step 5: Solve for x
    x = 59,006.67/345.08
  6. Step 6: Final answer
    x = 170.99

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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.