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Finding the Fourth Proportional to 432.41, 649.15 and 412.79

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Solution

The fourth proportional to 432.41, 649.15 and 412.79 is: 619.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    432.41 : 649.15 = 412.79 : x
  2. Step 2: Convert to fraction form
    432.41/649.15 = 412.79/x
  3. Step 3: Cross multiply
    432.41x = 649.15 × 412.79
  4. Step 4: Simplify right side
    432.41x = 267,958.35
  5. Step 5: Solve for x
    x = 267,958.35/432.41
  6. Step 6: Final answer
    x = 619.69

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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.