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Finding the Fourth Proportional to 671.22, 926.37 and 422.64

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Solution

The fourth proportional to 671.22, 926.37 and 422.64 is: 583.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    671.22 : 926.37 = 422.64 : x
  2. Step 2: Convert to fraction form
    671.22/926.37 = 422.64/x
  3. Step 3: Cross multiply
    671.22x = 926.37 × 422.64
  4. Step 4: Simplify right side
    671.22x = 391,521.02
  5. Step 5: Solve for x
    x = 391,521.02/671.22
  6. Step 6: Final answer
    x = 583.30

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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.