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Finding the Fourth Proportional to 322.26, 444.79 and 307.61

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Solution

The fourth proportional to 322.26, 444.79 and 307.61 is: 424.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    322.26 : 444.79 = 307.61 : x
  2. Step 2: Convert to fraction form
    322.26/444.79 = 307.61/x
  3. Step 3: Cross multiply
    322.26x = 444.79 × 307.61
  4. Step 4: Simplify right side
    322.26x = 136,821.85
  5. Step 5: Solve for x
    x = 136,821.85/322.26
  6. Step 6: Final answer
    x = 424.57

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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.