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Finding the Fourth Proportional to 1,149.19, 1,722.93 and 419.38

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Solution

The fourth proportional to 1,149.19, 1,722.93 and 419.38 is: 628.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,149.19 : 1,722.93 = 419.38 : x
  2. Step 2: Convert to fraction form
    1,149.19/1,722.93 = 419.38/x
  3. Step 3: Cross multiply
    1,149.19x = 1,722.93 × 419.38
  4. Step 4: Simplify right side
    1,149.19x = 722,562.38
  5. Step 5: Solve for x
    x = 722,562.38/1,149.19
  6. Step 6: Final answer
    x = 628.76

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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.