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Finding the Fourth Proportional to 1,181.72, 1,630.62 and 684.33

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Solution

The fourth proportional to 1,181.72, 1,630.62 and 684.33 is: 944.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,181.72 : 1,630.62 = 684.33 : x
  2. Step 2: Convert to fraction form
    1,181.72/1,630.62 = 684.33/x
  3. Step 3: Cross multiply
    1,181.72x = 1,630.62 × 684.33
  4. Step 4: Simplify right side
    1,181.72x = 1,115,882.18
  5. Step 5: Solve for x
    x = 1,115,882.18/1,181.72
  6. Step 6: Final answer
    x = 944.29

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.