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Finding the Fourth Proportional to 641.03, 883.88 and 448.91

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Solution

The fourth proportional to 641.03, 883.88 and 448.91 is: 618.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    641.03 : 883.88 = 448.91 : x
  2. Step 2: Convert to fraction form
    641.03/883.88 = 448.91/x
  3. Step 3: Cross multiply
    641.03x = 883.88 × 448.91
  4. Step 4: Simplify right side
    641.03x = 396,780.33
  5. Step 5: Solve for x
    x = 396,780.33/641.03
  6. Step 6: Final answer
    x = 618.97

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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.