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Finding the Fourth Proportional to 663.44, 992.79 and 403.34

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Solution

The fourth proportional to 663.44, 992.79 and 403.34 is: 603.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    663.44 : 992.79 = 403.34 : x
  2. Step 2: Convert to fraction form
    663.44/992.79 = 403.34/x
  3. Step 3: Cross multiply
    663.44x = 992.79 × 403.34
  4. Step 4: Simplify right side
    663.44x = 400,426.95
  5. Step 5: Solve for x
    x = 400,426.95/663.44
  6. Step 6: Final answer
    x = 603.57

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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.