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Finding the Fourth Proportional to 698.97, 964.80 and 477.84

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Solution

The fourth proportional to 698.97, 964.80 and 477.84 is: 659.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    698.97 : 964.80 = 477.84 : x
  2. Step 2: Convert to fraction form
    698.97/964.80 = 477.84/x
  3. Step 3: Cross multiply
    698.97x = 964.80 × 477.84
  4. Step 4: Simplify right side
    698.97x = 461,020.03
  5. Step 5: Solve for x
    x = 461,020.03/698.97
  6. Step 6: Final answer
    x = 659.57

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Double scale
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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.