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Finding the Fourth Proportional to 223.26, 332.61 and 215.06

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Solution

The fourth proportional to 223.26, 332.61 and 215.06 is: 320.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    223.26 : 332.61 = 215.06 : x
  2. Step 2: Convert to fraction form
    223.26/332.61 = 215.06/x
  3. Step 3: Cross multiply
    223.26x = 332.61 × 215.06
  4. Step 4: Simplify right side
    223.26x = 71,528.64
  5. Step 5: Solve for x
    x = 71,528.64/223.26
  6. Step 6: Final answer
    x = 320.39

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.