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Finding the Fourth Proportional to 223.91, 309 and 130.65

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Solution

The fourth proportional to 223.91, 309 and 130.65 is: 180.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    223.91 : 309 = 130.65 : x
  2. Step 2: Convert to fraction form
    223.91/309 = 130.65/x
  3. Step 3: Cross multiply
    223.91x = 309 × 130.65
  4. Step 4: Simplify right side
    223.91x = 40,370.85
  5. Step 5: Solve for x
    x = 40,370.85/223.91
  6. Step 6: Final answer
    x = 180.30

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.