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Finding the Fourth Proportional to 215.69, 323.60 and 100.13

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Solution

The fourth proportional to 215.69, 323.60 and 100.13 is: 150.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    215.69 : 323.60 = 100.13 : x
  2. Step 2: Convert to fraction form
    215.69/323.60 = 100.13/x
  3. Step 3: Cross multiply
    215.69x = 323.60 × 100.13
  4. Step 4: Simplify right side
    215.69x = 32,399.95
  5. Step 5: Solve for x
    x = 32,399.95/215.69
  6. Step 6: Final answer
    x = 150.22

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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.