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Finding the Fourth Proportional to 676.95, 934.17 and 378.18

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Solution

The fourth proportional to 676.95, 934.17 and 378.18 is: 521.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    676.95 : 934.17 = 378.18 : x
  2. Step 2: Convert to fraction form
    676.95/934.17 = 378.18/x
  3. Step 3: Cross multiply
    676.95x = 934.17 × 378.18
  4. Step 4: Simplify right side
    676.95x = 353,284.41
  5. Step 5: Solve for x
    x = 353,284.41/676.95
  6. Step 6: Final answer
    x = 521.88

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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.