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Finding the Fourth Proportional to 1,903.86, 2,855.39 and 605.70

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Solution

The fourth proportional to 1,903.86, 2,855.39 and 605.70 is: 908.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,903.86 : 2,855.39 = 605.70 : x
  2. Step 2: Convert to fraction form
    1,903.86/2,855.39 = 605.70/x
  3. Step 3: Cross multiply
    1,903.86x = 2,855.39 × 605.70
  4. Step 4: Simplify right side
    1,903.86x = 1,729,506.69
  5. Step 5: Solve for x
    x = 1,729,506.69/1,903.86
  6. Step 6: Final answer
    x = 908.42

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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.