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Finding the Fourth Proportional to 1,553.80, 2,329.14 and 629.20

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Solution

The fourth proportional to 1,553.80, 2,329.14 and 629.20 is: 943.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,553.80 : 2,329.14 = 629.20 : x
  2. Step 2: Convert to fraction form
    1,553.80/2,329.14 = 629.20/x
  3. Step 3: Cross multiply
    1,553.80x = 2,329.14 × 629.20
  4. Step 4: Simplify right side
    1,553.80x = 1,465,494.89
  5. Step 5: Solve for x
    x = 1,465,494.89/1,553.80
  6. Step 6: Final answer
    x = 943.17

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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.