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Finding the Fourth Proportional to 289.08, 433.36 and 186.40

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Solution

The fourth proportional to 289.08, 433.36 and 186.40 is: 279.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    289.08 : 433.36 = 186.40 : x
  2. Step 2: Convert to fraction form
    289.08/433.36 = 186.40/x
  3. Step 3: Cross multiply
    289.08x = 433.36 × 186.40
  4. Step 4: Simplify right side
    289.08x = 80,778.30
  5. Step 5: Solve for x
    x = 80,778.30/289.08
  6. Step 6: Final answer
    x = 279.43

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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.