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Finding the Fourth Proportional to 288.62, 432.75 and 191.02

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Solution

The fourth proportional to 288.62, 432.75 and 191.02 is: 286.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    288.62 : 432.75 = 191.02 : x
  2. Step 2: Convert to fraction form
    288.62/432.75 = 191.02/x
  3. Step 3: Cross multiply
    288.62x = 432.75 × 191.02
  4. Step 4: Simplify right side
    288.62x = 82,663.54
  5. Step 5: Solve for x
    x = 82,663.54/288.62
  6. Step 6: Final answer
    x = 286.41

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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.