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Finding the Fourth Proportional to 880.24, 1,313.84 and 662.80

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Solution

The fourth proportional to 880.24, 1,313.84 and 662.80 is: 989.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    880.24 : 1,313.84 = 662.80 : x
  2. Step 2: Convert to fraction form
    880.24/1,313.84 = 662.80/x
  3. Step 3: Cross multiply
    880.24x = 1,313.84 × 662.80
  4. Step 4: Simplify right side
    880.24x = 870,813.15
  5. Step 5: Solve for x
    x = 870,813.15/880.24
  6. Step 6: Final answer
    x = 989.29

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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.