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Finding the Fourth Proportional to 1,603.87, 2,405.19 and 629.44

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Solution

The fourth proportional to 1,603.87, 2,405.19 and 629.44 is: 943.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,603.87 : 2,405.19 = 629.44 : x
  2. Step 2: Convert to fraction form
    1,603.87/2,405.19 = 629.44/x
  3. Step 3: Cross multiply
    1,603.87x = 2,405.19 × 629.44
  4. Step 4: Simplify right side
    1,603.87x = 1,513,919.14
  5. Step 5: Solve for x
    x = 1,513,919.14/1,603.87
  6. Step 6: Final answer
    x = 943.92

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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.