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Finding the Fourth Proportional to 213.11, 293.87 and 146.78

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Solution

The fourth proportional to 213.11, 293.87 and 146.78 is: 202.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    213.11 : 293.87 = 146.78 : x
  2. Step 2: Convert to fraction form
    213.11/293.87 = 146.78/x
  3. Step 3: Cross multiply
    213.11x = 293.87 × 146.78
  4. Step 4: Simplify right side
    213.11x = 43,132.04
  5. Step 5: Solve for x
    x = 43,132.04/213.11
  6. Step 6: Final answer
    x = 202.40

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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.