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Finding the Fourth Proportional to 288.41, 432.21 and 190.75

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Solution

The fourth proportional to 288.41, 432.21 and 190.75 is: 285.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    288.41 : 432.21 = 190.75 : x
  2. Step 2: Convert to fraction form
    288.41/432.21 = 190.75/x
  3. Step 3: Cross multiply
    288.41x = 432.21 × 190.75
  4. Step 4: Simplify right side
    288.41x = 82,442.02
  5. Step 5: Solve for x
    x = 82,442.02/288.41
  6. Step 6: Final answer
    x = 285.85

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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.