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Finding the Fourth Proportional to 676.95, 934.20 and 415.11

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Solution

The fourth proportional to 676.95, 934.20 and 415.11 is: 572.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    676.95 : 934.20 = 415.11 : x
  2. Step 2: Convert to fraction form
    676.95/934.20 = 415.11/x
  3. Step 3: Cross multiply
    676.95x = 934.20 × 415.11
  4. Step 4: Simplify right side
    676.95x = 387,795.76
  5. Step 5: Solve for x
    x = 387,795.76/676.95
  6. Step 6: Final answer
    x = 572.86

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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.