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Finding the Fourth Proportional to 899.49, 1,349.21 and 668.77

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Solution

The fourth proportional to 899.49, 1,349.21 and 668.77 is: 1,003.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    899.49 : 1,349.21 = 668.77 : x
  2. Step 2: Convert to fraction form
    899.49/1,349.21 = 668.77/x
  3. Step 3: Cross multiply
    899.49x = 1,349.21 × 668.77
  4. Step 4: Simplify right side
    899.49x = 902,311.17
  5. Step 5: Solve for x
    x = 902,311.17/899.49
  6. Step 6: Final answer
    x = 1,003.14

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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.