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Finding the Fourth Proportional to 662.92, 990.05 and 564.37

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Solution

The fourth proportional to 662.92, 990.05 and 564.37 is: 842.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    662.92 : 990.05 = 564.37 : x
  2. Step 2: Convert to fraction form
    662.92/990.05 = 564.37/x
  3. Step 3: Cross multiply
    662.92x = 990.05 × 564.37
  4. Step 4: Simplify right side
    662.92x = 558,757.97
  5. Step 5: Solve for x
    x = 558,757.97/662.92
  6. Step 6: Final answer
    x = 842.87

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.