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Finding the Fourth Proportional to 3,409.43, 5,113.89 and 910.43

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Solution

The fourth proportional to 3,409.43, 5,113.89 and 910.43 is: 1,365.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,409.43 : 5,113.89 = 910.43 : x
  2. Step 2: Convert to fraction form
    3,409.43/5,113.89 = 910.43/x
  3. Step 3: Cross multiply
    3,409.43x = 5,113.89 × 910.43
  4. Step 4: Simplify right side
    3,409.43x = 4,655,813.30
  5. Step 5: Solve for x
    x = 4,655,813.30/3,409.43
  6. Step 6: Final answer
    x = 1,365.57

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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.