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Finding the Fourth Proportional to 671.20, 926.07 and 422.85

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Solution

The fourth proportional to 671.20, 926.07 and 422.85 is: 583.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    671.20 : 926.07 = 422.85 : x
  2. Step 2: Convert to fraction form
    671.20/926.07 = 422.85/x
  3. Step 3: Cross multiply
    671.20x = 926.07 × 422.85
  4. Step 4: Simplify right side
    671.20x = 391,588.70
  5. Step 5: Solve for x
    x = 391,588.70/671.20
  6. Step 6: Final answer
    x = 583.42

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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.