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Finding the Fourth Proportional to 671.12, 926.28 and 438.32

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Solution

The fourth proportional to 671.12, 926.28 and 438.32 is: 604.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    671.12 : 926.28 = 438.32 : x
  2. Step 2: Convert to fraction form
    671.12/926.28 = 438.32/x
  3. Step 3: Cross multiply
    671.12x = 926.28 × 438.32
  4. Step 4: Simplify right side
    671.12x = 406,007.05
  5. Step 5: Solve for x
    x = 406,007.05/671.12
  6. Step 6: Final answer
    x = 604.97

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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.