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Finding the Fourth Proportional to 1,207.92, 1,812.44 and 630.96

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Solution

The fourth proportional to 1,207.92, 1,812.44 and 630.96 is: 946.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,207.92 : 1,812.44 = 630.96 : x
  2. Step 2: Convert to fraction form
    1,207.92/1,812.44 = 630.96/x
  3. Step 3: Cross multiply
    1,207.92x = 1,812.44 × 630.96
  4. Step 4: Simplify right side
    1,207.92x = 1,143,577.14
  5. Step 5: Solve for x
    x = 1,143,577.14/1,207.92
  6. Step 6: Final answer
    x = 946.73

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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.