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Finding the Fourth Proportional to 288.82, 432.96 and 191.35

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Solution

The fourth proportional to 288.82, 432.96 and 191.35 is: 286.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    288.82 : 432.96 = 191.35 : x
  2. Step 2: Convert to fraction form
    288.82/432.96 = 191.35/x
  3. Step 3: Cross multiply
    288.82x = 432.96 × 191.35
  4. Step 4: Simplify right side
    288.82x = 82,846.90
  5. Step 5: Solve for x
    x = 82,846.90/288.82
  6. Step 6: Final answer
    x = 286.85

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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.