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Finding the Fourth Proportional to 641.21, 884.95 and 444.38

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Solution

The fourth proportional to 641.21, 884.95 and 444.38 is: 613.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    641.21 : 884.95 = 444.38 : x
  2. Step 2: Convert to fraction form
    641.21/884.95 = 444.38/x
  3. Step 3: Cross multiply
    641.21x = 884.95 × 444.38
  4. Step 4: Simplify right side
    641.21x = 393,248.55
  5. Step 5: Solve for x
    x = 393,248.55/641.21
  6. Step 6: Final answer
    x = 613.30

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Double scale
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1.5x scale

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.