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Finding the Fourth Proportional to 697.66, 961.83 and 579.21

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Solution

The fourth proportional to 697.66, 961.83 and 579.21 is: 798.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    697.66 : 961.83 = 579.21 : x
  2. Step 2: Convert to fraction form
    697.66/961.83 = 579.21/x
  3. Step 3: Cross multiply
    697.66x = 961.83 × 579.21
  4. Step 4: Simplify right side
    697.66x = 557,101.55
  5. Step 5: Solve for x
    x = 557,101.55/697.66
  6. Step 6: Final answer
    x = 798.53

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1.5x scale

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.