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Finding the Fourth Proportional to 1,149.99, 1,725.24 and 419.57

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Solution

The fourth proportional to 1,149.99, 1,725.24 and 419.57 is: 629.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,149.99 : 1,725.24 = 419.57 : x
  2. Step 2: Convert to fraction form
    1,149.99/1,725.24 = 419.57/x
  3. Step 3: Cross multiply
    1,149.99x = 1,725.24 × 419.57
  4. Step 4: Simplify right side
    1,149.99x = 723,849.53
  5. Step 5: Solve for x
    x = 723,849.53/1,149.99
  6. Step 6: Final answer
    x = 629.44

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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.