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Finding the Fourth Proportional to 698.84, 964.39 and 404.27

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Solution

The fourth proportional to 698.84, 964.39 and 404.27 is: 557.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    698.84 : 964.39 = 404.27 : x
  2. Step 2: Convert to fraction form
    698.84/964.39 = 404.27/x
  3. Step 3: Cross multiply
    698.84x = 964.39 × 404.27
  4. Step 4: Simplify right side
    698.84x = 389,879.62
  5. Step 5: Solve for x
    x = 389,879.62/698.84
  6. Step 6: Final answer
    x = 557.90

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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.