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Finding the Fourth Proportional to 607.38, 838.19 and 331.38

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Solution

The fourth proportional to 607.38, 838.19 and 331.38 is: 457.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    607.38 : 838.19 = 331.38 : x
  2. Step 2: Convert to fraction form
    607.38/838.19 = 331.38/x
  3. Step 3: Cross multiply
    607.38x = 838.19 × 331.38
  4. Step 4: Simplify right side
    607.38x = 277,759.40
  5. Step 5: Solve for x
    x = 277,759.40/607.38
  6. Step 6: Final answer
    x = 457.31

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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.