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Finding the Fourth Proportional to 697.68, 963.11 and 511.18

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Solution

The fourth proportional to 697.68, 963.11 and 511.18 is: 705.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    697.68 : 963.11 = 511.18 : x
  2. Step 2: Convert to fraction form
    697.68/963.11 = 511.18/x
  3. Step 3: Cross multiply
    697.68x = 963.11 × 511.18
  4. Step 4: Simplify right side
    697.68x = 492,321.44
  5. Step 5: Solve for x
    x = 492,321.44/697.68
  6. Step 6: Final answer
    x = 705.66

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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.