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Finding the Fourth Proportional to 432.69, 649.09 and 286.44

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Solution

The fourth proportional to 432.69, 649.09 and 286.44 is: 429.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    432.69 : 649.09 = 286.44 : x
  2. Step 2: Convert to fraction form
    432.69/649.09 = 286.44/x
  3. Step 3: Cross multiply
    432.69x = 649.09 × 286.44
  4. Step 4: Simplify right side
    432.69x = 185,922.46
  5. Step 5: Solve for x
    x = 185,922.46/432.69
  6. Step 6: Final answer
    x = 429.69

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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.