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Finding the Fourth Proportional to 189.40, 284.31 and 151.34

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Solution

The fourth proportional to 189.40, 284.31 and 151.34 is: 227.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    189.40 : 284.31 = 151.34 : x
  2. Step 2: Convert to fraction form
    189.40/284.31 = 151.34/x
  3. Step 3: Cross multiply
    189.40x = 284.31 × 151.34
  4. Step 4: Simplify right side
    189.40x = 43,027.48
  5. Step 5: Solve for x
    x = 43,027.48/189.40
  6. Step 6: Final answer
    x = 227.18

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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.