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Finding the Fourth Proportional to 1,161.59, 1,742.57 and 381.36

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Solution

The fourth proportional to 1,161.59, 1,742.57 and 381.36 is: 572.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,161.59 : 1,742.57 = 381.36 : x
  2. Step 2: Convert to fraction form
    1,161.59/1,742.57 = 381.36/x
  3. Step 3: Cross multiply
    1,161.59x = 1,742.57 × 381.36
  4. Step 4: Simplify right side
    1,161.59x = 664,546.50
  5. Step 5: Solve for x
    x = 664,546.50/1,161.59
  6. Step 6: Final answer
    x = 572.10

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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.