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Finding the Fourth Proportional to 488.18, 671.83 and 449.03

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Solution

The fourth proportional to 488.18, 671.83 and 449.03 is: 617.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    488.18 : 671.83 = 449.03 : x
  2. Step 2: Convert to fraction form
    488.18/671.83 = 449.03/x
  3. Step 3: Cross multiply
    488.18x = 671.83 × 449.03
  4. Step 4: Simplify right side
    488.18x = 301,672.38
  5. Step 5: Solve for x
    x = 301,672.38/488.18
  6. Step 6: Final answer
    x = 617.95

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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.