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Finding the Fourth Proportional to 698.36, 963.66 and 418.54

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Solution

The fourth proportional to 698.36, 963.66 and 418.54 is: 577.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    698.36 : 963.66 = 418.54 : x
  2. Step 2: Convert to fraction form
    698.36/963.66 = 418.54/x
  3. Step 3: Cross multiply
    698.36x = 963.66 × 418.54
  4. Step 4: Simplify right side
    698.36x = 403,330.26
  5. Step 5: Solve for x
    x = 403,330.26/698.36
  6. Step 6: Final answer
    x = 577.54

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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.