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Finding the Fourth Proportional to 213.77, 320.64 and 126.83

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Solution

The fourth proportional to 213.77, 320.64 and 126.83 is: 190.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    213.77 : 320.64 = 126.83 : x
  2. Step 2: Convert to fraction form
    213.77/320.64 = 126.83/x
  3. Step 3: Cross multiply
    213.77x = 320.64 × 126.83
  4. Step 4: Simplify right side
    213.77x = 40,667.81
  5. Step 5: Solve for x
    x = 40,667.81/213.77
  6. Step 6: Final answer
    x = 190.24

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.