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Finding the Fourth Proportional to 340.10, 510.21 and 105.85

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Solution

The fourth proportional to 340.10, 510.21 and 105.85 is: 158.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    340.10 : 510.21 = 105.85 : x
  2. Step 2: Convert to fraction form
    340.10/510.21 = 105.85/x
  3. Step 3: Cross multiply
    340.10x = 510.21 × 105.85
  4. Step 4: Simplify right side
    340.10x = 54,005.97
  5. Step 5: Solve for x
    x = 54,005.97/340.10
  6. Step 6: Final answer
    x = 158.79

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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.