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Finding the Fourth Proportional to 663.97, 916.37 and 401.99

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Solution

The fourth proportional to 663.97, 916.37 and 401.99 is: 554.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    663.97 : 916.37 = 401.99 : x
  2. Step 2: Convert to fraction form
    663.97/916.37 = 401.99/x
  3. Step 3: Cross multiply
    663.97x = 916.37 × 401.99
  4. Step 4: Simplify right side
    663.97x = 368,369.57
  5. Step 5: Solve for x
    x = 368,369.57/663.97
  6. Step 6: Final answer
    x = 554.80

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.