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Finding the Fourth Proportional to 339.99, 510.05 and 108.86

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Solution

The fourth proportional to 339.99, 510.05 and 108.86 is: 163.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    339.99 : 510.05 = 108.86 : x
  2. Step 2: Convert to fraction form
    339.99/510.05 = 108.86/x
  3. Step 3: Cross multiply
    339.99x = 510.05 × 108.86
  4. Step 4: Simplify right side
    339.99x = 55,524.04
  5. Step 5: Solve for x
    x = 55,524.04/339.99
  6. Step 6: Final answer
    x = 163.31

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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.