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Finding the Fourth Proportional to 288.83, 432.95 and 115.43

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Solution

The fourth proportional to 288.83, 432.95 and 115.43 is: 173.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    288.83 : 432.95 = 115.43 : x
  2. Step 2: Convert to fraction form
    288.83/432.95 = 115.43/x
  3. Step 3: Cross multiply
    288.83x = 432.95 × 115.43
  4. Step 4: Simplify right side
    288.83x = 49,972.68
  5. Step 5: Solve for x
    x = 49,972.68/288.83
  6. Step 6: Final answer
    x = 173.02

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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.