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Finding the Fourth Proportional to 698.88, 964.46 and 388.38

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Solution

The fourth proportional to 698.88, 964.46 and 388.38 is: 535.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    698.88 : 964.46 = 388.38 : x
  2. Step 2: Convert to fraction form
    698.88/964.46 = 388.38/x
  3. Step 3: Cross multiply
    698.88x = 964.46 × 388.38
  4. Step 4: Simplify right side
    698.88x = 374,576.97
  5. Step 5: Solve for x
    x = 374,576.97/698.88
  6. Step 6: Final answer
    x = 535.97

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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.