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Finding the Fourth Proportional to 213.23, 293.98 and 154.17

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Solution

The fourth proportional to 213.23, 293.98 and 154.17 is: 212.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    213.23 : 293.98 = 154.17 : x
  2. Step 2: Convert to fraction form
    213.23/293.98 = 154.17/x
  3. Step 3: Cross multiply
    213.23x = 293.98 × 154.17
  4. Step 4: Simplify right side
    213.23x = 45,322.90
  5. Step 5: Solve for x
    x = 45,322.90/213.23
  6. Step 6: Final answer
    x = 212.55

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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.