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Finding the Fourth Proportional to 212.94, 292.28 and 189.10

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Solution

The fourth proportional to 212.94, 292.28 and 189.10 is: 259.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    212.94 : 292.28 = 189.10 : x
  2. Step 2: Convert to fraction form
    212.94/292.28 = 189.10/x
  3. Step 3: Cross multiply
    212.94x = 292.28 × 189.10
  4. Step 4: Simplify right side
    212.94x = 55,268.69
  5. Step 5: Solve for x
    x = 55,268.69/212.94
  6. Step 6: Final answer
    x = 259.56

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.