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Finding the Fourth Proportional to 320.65, 441.71 and 222.23

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Solution

The fourth proportional to 320.65, 441.71 and 222.23 is: 306.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    320.65 : 441.71 = 222.23 : x
  2. Step 2: Convert to fraction form
    320.65/441.71 = 222.23/x
  3. Step 3: Cross multiply
    320.65x = 441.71 × 222.23
  4. Step 4: Simplify right side
    320.65x = 98,161.21
  5. Step 5: Solve for x
    x = 98,161.21/320.65
  6. Step 6: Final answer
    x = 306.13

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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.