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Finding the Fourth Proportional to 223.58, 307.88 and 212.65

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Solution

The fourth proportional to 223.58, 307.88 and 212.65 is: 292.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    223.58 : 307.88 = 212.65 : x
  2. Step 2: Convert to fraction form
    223.58/307.88 = 212.65/x
  3. Step 3: Cross multiply
    223.58x = 307.88 × 212.65
  4. Step 4: Simplify right side
    223.58x = 65,469.65
  5. Step 5: Solve for x
    x = 65,469.65/223.58
  6. Step 6: Final answer
    x = 292.82

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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.