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Finding the Fourth Proportional to 1,553.82, 2,331.15 and 629.16

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Solution

The fourth proportional to 1,553.82, 2,331.15 and 629.16 is: 943.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,553.82 : 2,331.15 = 629.16 : x
  2. Step 2: Convert to fraction form
    1,553.82/2,331.15 = 629.16/x
  3. Step 3: Cross multiply
    1,553.82x = 2,331.15 × 629.16
  4. Step 4: Simplify right side
    1,553.82x = 1,466,666.33
  5. Step 5: Solve for x
    x = 1,466,666.33/1,553.82
  6. Step 6: Final answer
    x = 943.91

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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.