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Finding the Fourth Proportional to 999.43, 1,494.78 and 890.44

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Solution

The fourth proportional to 999.43, 1,494.78 and 890.44 is: 1,331.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    999.43 : 1,494.78 = 890.44 : x
  2. Step 2: Convert to fraction form
    999.43/1,494.78 = 890.44/x
  3. Step 3: Cross multiply
    999.43x = 1,494.78 × 890.44
  4. Step 4: Simplify right side
    999.43x = 1,331,011.90
  5. Step 5: Solve for x
    x = 1,331,011.90/999.43
  6. Step 6: Final answer
    x = 1,331.77

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