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Finding the Fourth Proportional to 1,161.88, 1,744.20 and 615.13

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Solution

The fourth proportional to 1,161.88, 1,744.20 and 615.13 is: 923.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,161.88 : 1,744.20 = 615.13 : x
  2. Step 2: Convert to fraction form
    1,161.88/1,744.20 = 615.13/x
  3. Step 3: Cross multiply
    1,161.88x = 1,744.20 × 615.13
  4. Step 4: Simplify right side
    1,161.88x = 1,072,905.39
  5. Step 5: Solve for x
    x = 1,072,905.39/1,161.88
  6. Step 6: Final answer
    x = 923.42

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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.