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Finding the Fourth Proportional to 461.34, 636.19 and 378.18

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Solution

The fourth proportional to 461.34, 636.19 and 378.18 is: 521.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    461.34 : 636.19 = 378.18 : x
  2. Step 2: Convert to fraction form
    461.34/636.19 = 378.18/x
  3. Step 3: Cross multiply
    461.34x = 636.19 × 378.18
  4. Step 4: Simplify right side
    461.34x = 240,593.39
  5. Step 5: Solve for x
    x = 240,593.39/461.34
  6. Step 6: Final answer
    x = 521.51

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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.