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Finding the Fourth Proportional to 863.99, 1,296.45 and 401.98

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Solution

The fourth proportional to 863.99, 1,296.45 and 401.98 is: 603.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    863.99 : 1,296.45 = 401.98 : x
  2. Step 2: Convert to fraction form
    863.99/1,296.45 = 401.98/x
  3. Step 3: Cross multiply
    863.99x = 1,296.45 × 401.98
  4. Step 4: Simplify right side
    863.99x = 521,146.97
  5. Step 5: Solve for x
    x = 521,146.97/863.99
  6. Step 6: Final answer
    x = 603.19

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.