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Finding the Fourth Proportional to 213.16, 293.61 and 188.66

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Solution

The fourth proportional to 213.16, 293.61 and 188.66 is: 259.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    213.16 : 293.61 = 188.66 : x
  2. Step 2: Convert to fraction form
    213.16/293.61 = 188.66/x
  3. Step 3: Cross multiply
    213.16x = 293.61 × 188.66
  4. Step 4: Simplify right side
    213.16x = 55,392.46
  5. Step 5: Solve for x
    x = 55,392.46/213.16
  6. Step 6: Final answer
    x = 259.86

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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.