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Finding the Fourth Proportional to 1,553.28, 2,329.93 and 628.21

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Solution

The fourth proportional to 1,553.28, 2,329.93 and 628.21 is: 942.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,553.28 : 2,329.93 = 628.21 : x
  2. Step 2: Convert to fraction form
    1,553.28/2,329.93 = 628.21/x
  3. Step 3: Cross multiply
    1,553.28x = 2,329.93 × 628.21
  4. Step 4: Simplify right side
    1,553.28x = 1,463,672.38
  5. Step 5: Solve for x
    x = 1,463,672.38/1,553.28
  6. Step 6: Final answer
    x = 942.31

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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.