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Finding the Fourth Proportional to 3,145, 4,341.18 and 1,903

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Solution

The fourth proportional to 3,145, 4,341.18 and 1,903 is: 2,626.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,145 : 4,341.18 = 1,903 : x
  2. Step 2: Convert to fraction form
    3,145/4,341.18 = 1,903/x
  3. Step 3: Cross multiply
    3,145x = 4,341.18 × 1,903
  4. Step 4: Simplify right side
    3,145x = 8,261,265.54
  5. Step 5: Solve for x
    x = 8,261,265.54/3,145
  6. Step 6: Final answer
    x = 2,626.79

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.