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Finding the Fourth Proportional to 449.94, 671.41 and 432.17

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Solution

The fourth proportional to 449.94, 671.41 and 432.17 is: 644.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    449.94 : 671.41 = 432.17 : x
  2. Step 2: Convert to fraction form
    449.94/671.41 = 432.17/x
  3. Step 3: Cross multiply
    449.94x = 671.41 × 432.17
  4. Step 4: Simplify right side
    449.94x = 290,163.26
  5. Step 5: Solve for x
    x = 290,163.26/449.94
  6. Step 6: Final answer
    x = 644.89

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.