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Finding the Fourth Proportional to 213.39, 294.10 and 155.07

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Solution

The fourth proportional to 213.39, 294.10 and 155.07 is: 213.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    213.39 : 294.10 = 155.07 : x
  2. Step 2: Convert to fraction form
    213.39/294.10 = 155.07/x
  3. Step 3: Cross multiply
    213.39x = 294.10 × 155.07
  4. Step 4: Simplify right side
    213.39x = 45,605.70
  5. Step 5: Solve for x
    x = 45,605.70/213.39
  6. Step 6: Final answer
    x = 213.72

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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.