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Finding the Fourth Proportional to 212, 291.84 and 190.16

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Solution

The fourth proportional to 212, 291.84 and 190.16 is: 261.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    212 : 291.84 = 190.16 : x
  2. Step 2: Convert to fraction form
    212/291.84 = 190.16/x
  3. Step 3: Cross multiply
    212x = 291.84 × 190.16
  4. Step 4: Simplify right side
    212x = 55,496.29
  5. Step 5: Solve for x
    x = 55,496.29/212
  6. Step 6: Final answer
    x = 261.77

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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.