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Finding the Fourth Proportional to 697.86, 961.74 and 609.17

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Solution

The fourth proportional to 697.86, 961.74 and 609.17 is: 839.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    697.86 : 961.74 = 609.17 : x
  2. Step 2: Convert to fraction form
    697.86/961.74 = 609.17/x
  3. Step 3: Cross multiply
    697.86x = 961.74 × 609.17
  4. Step 4: Simplify right side
    697.86x = 585,858.35
  5. Step 5: Solve for x
    x = 585,858.35/697.86
  6. Step 6: Final answer
    x = 839.51

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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.