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Finding the Fourth Proportional to 1,175.09, 1,621.41 and 755.30

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Solution

The fourth proportional to 1,175.09, 1,621.41 and 755.30 is: 1,042.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,175.09 : 1,621.41 = 755.30 : x
  2. Step 2: Convert to fraction form
    1,175.09/1,621.41 = 755.30/x
  3. Step 3: Cross multiply
    1,175.09x = 1,621.41 × 755.30
  4. Step 4: Simplify right side
    1,175.09x = 1,224,650.97
  5. Step 5: Solve for x
    x = 1,224,650.97/1,175.09
  6. Step 6: Final answer
    x = 1,042.18

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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.