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Finding the Fourth Proportional to 433.12, 649.32 and 189.61

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Solution

The fourth proportional to 433.12, 649.32 and 189.61 is: 284.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    433.12 : 649.32 = 189.61 : x
  2. Step 2: Convert to fraction form
    433.12/649.32 = 189.61/x
  3. Step 3: Cross multiply
    433.12x = 649.32 × 189.61
  4. Step 4: Simplify right side
    433.12x = 123,117.57
  5. Step 5: Solve for x
    x = 123,117.57/433.12
  6. Step 6: Final answer
    x = 284.26

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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.