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Finding the Fourth Proportional to 697.20, 959.20 and 693.96

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Solution

The fourth proportional to 697.20, 959.20 and 693.96 is: 954.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    697.20 : 959.20 = 693.96 : x
  2. Step 2: Convert to fraction form
    697.20/959.20 = 693.96/x
  3. Step 3: Cross multiply
    697.20x = 959.20 × 693.96
  4. Step 4: Simplify right side
    697.20x = 665,646.43
  5. Step 5: Solve for x
    x = 665,646.43/697.20
  6. Step 6: Final answer
    x = 954.74

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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.