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Finding the Fourth Proportional to 677, 934.34 and 401

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Solution

The fourth proportional to 677, 934.34 and 401 is: 553.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    677 : 934.34 = 401 : x
  2. Step 2: Convert to fraction form
    677/934.34 = 401/x
  3. Step 3: Cross multiply
    677x = 934.34 × 401
  4. Step 4: Simplify right side
    677x = 374,670.34
  5. Step 5: Solve for x
    x = 374,670.34/677
  6. Step 6: Final answer
    x = 553.43

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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.