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Finding the Fourth Proportional to 671.32, 926.20 and 422.89

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Solution

The fourth proportional to 671.32, 926.20 and 422.89 is: 583.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    671.32 : 926.20 = 422.89 : x
  2. Step 2: Convert to fraction form
    671.32/926.20 = 422.89/x
  3. Step 3: Cross multiply
    671.32x = 926.20 × 422.89
  4. Step 4: Simplify right side
    671.32x = 391,680.72
  5. Step 5: Solve for x
    x = 391,680.72/671.32
  6. Step 6: Final answer
    x = 583.45

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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.