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Finding the Fourth Proportional to 676.85, 934.05 and 378.09

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Solution

The fourth proportional to 676.85, 934.05 and 378.09 is: 521.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    676.85 : 934.05 = 378.09 : x
  2. Step 2: Convert to fraction form
    676.85/934.05 = 378.09/x
  3. Step 3: Cross multiply
    676.85x = 934.05 × 378.09
  4. Step 4: Simplify right side
    676.85x = 353,154.96
  5. Step 5: Solve for x
    x = 353,154.96/676.85
  6. Step 6: Final answer
    x = 521.77

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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.