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Finding the Fourth Proportional to 676.89, 934.02 and 378.11

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Solution

The fourth proportional to 676.89, 934.02 and 378.11 is: 521.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    676.89 : 934.02 = 378.11 : x
  2. Step 2: Convert to fraction form
    676.89/934.02 = 378.11/x
  3. Step 3: Cross multiply
    676.89x = 934.02 × 378.11
  4. Step 4: Simplify right side
    676.89x = 353,157.63
  5. Step 5: Solve for x
    x = 353,157.63/676.89
  6. Step 6: Final answer
    x = 521.74

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Double scale
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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.