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Finding the Fourth Proportional to 671.54, 926.39 and 422.39

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Solution

The fourth proportional to 671.54, 926.39 and 422.39 is: 582.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    671.54 : 926.39 = 422.39 : x
  2. Step 2: Convert to fraction form
    671.54/926.39 = 422.39/x
  3. Step 3: Cross multiply
    671.54x = 926.39 × 422.39
  4. Step 4: Simplify right side
    671.54x = 391,296.29
  5. Step 5: Solve for x
    x = 391,296.29/671.54
  6. Step 6: Final answer
    x = 582.68

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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.