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Finding the Fourth Proportional to 1,840.75, 2,761.13 and 472.75

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Solution

The fourth proportional to 1,840.75, 2,761.13 and 472.75 is: 709.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,840.75 : 2,761.13 = 472.75 : x
  2. Step 2: Convert to fraction form
    1,840.75/2,761.13 = 472.75/x
  3. Step 3: Cross multiply
    1,840.75x = 2,761.13 × 472.75
  4. Step 4: Simplify right side
    1,840.75x = 1,305,324.21
  5. Step 5: Solve for x
    x = 1,305,324.21/1,840.75
  6. Step 6: Final answer
    x = 709.13

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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.