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Finding the Fourth Proportional to 698.97, 964.40 and 559.37

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Solution

The fourth proportional to 698.97, 964.40 and 559.37 is: 771.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    698.97 : 964.40 = 559.37 : x
  2. Step 2: Convert to fraction form
    698.97/964.40 = 559.37/x
  3. Step 3: Cross multiply
    698.97x = 964.40 × 559.37
  4. Step 4: Simplify right side
    698.97x = 539,459.19
  5. Step 5: Solve for x
    x = 539,459.19/698.97
  6. Step 6: Final answer
    x = 771.79

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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.