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Finding the Fourth Proportional to 671.32, 926.94 and 438.76

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Solution

The fourth proportional to 671.32, 926.94 and 438.76 is: 605.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    671.32 : 926.94 = 438.76 : x
  2. Step 2: Convert to fraction form
    671.32/926.94 = 438.76/x
  3. Step 3: Cross multiply
    671.32x = 926.94 × 438.76
  4. Step 4: Simplify right side
    671.32x = 406,704.19
  5. Step 5: Solve for x
    x = 406,704.19/671.32
  6. Step 6: Final answer
    x = 605.83

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Double scale
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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.