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Finding the Fourth Proportional to 641.41, 885.20 and 379.38

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Solution

The fourth proportional to 641.41, 885.20 and 379.38 is: 523.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    641.41 : 885.20 = 379.38 : x
  2. Step 2: Convert to fraction form
    641.41/885.20 = 379.38/x
  3. Step 3: Cross multiply
    641.41x = 885.20 × 379.38
  4. Step 4: Simplify right side
    641.41x = 335,827.18
  5. Step 5: Solve for x
    x = 335,827.18/641.41
  6. Step 6: Final answer
    x = 523.58

Related Problems

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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.