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Finding the Fourth Proportional to 288.78, 433.18 and 166.74

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Solution

The fourth proportional to 288.78, 433.18 and 166.74 is: 250.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    288.78 : 433.18 = 166.74 : x
  2. Step 2: Convert to fraction form
    288.78/433.18 = 166.74/x
  3. Step 3: Cross multiply
    288.78x = 433.18 × 166.74
  4. Step 4: Simplify right side
    288.78x = 72,228.43
  5. Step 5: Solve for x
    x = 72,228.43/288.78
  6. Step 6: Final answer
    x = 250.12

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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.