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Finding the Fourth Proportional to 663.93, 994.28 and 404.06

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Solution

The fourth proportional to 663.93, 994.28 and 404.06 is: 605.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    663.93 : 994.28 = 404.06 : x
  2. Step 2: Convert to fraction form
    663.93/994.28 = 404.06/x
  3. Step 3: Cross multiply
    663.93x = 994.28 × 404.06
  4. Step 4: Simplify right side
    663.93x = 401,741.79
  5. Step 5: Solve for x
    x = 401,741.79/663.93
  6. Step 6: Final answer
    x = 605.10

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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.