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Finding the Fourth Proportional to 649, 895.49 and 439.21

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Solution

The fourth proportional to 649, 895.49 and 439.21 is: 606.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    649 : 895.49 = 439.21 : x
  2. Step 2: Convert to fraction form
    649/895.49 = 439.21/x
  3. Step 3: Cross multiply
    649x = 895.49 × 439.21
  4. Step 4: Simplify right side
    649x = 393,305.97
  5. Step 5: Solve for x
    x = 393,305.97/649
  6. Step 6: Final answer
    x = 606.02

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.