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Finding the Fourth Proportional to 1,761.08, 2,641.74 and 665.48

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Solution

The fourth proportional to 1,761.08, 2,641.74 and 665.48 is: 998.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,761.08 : 2,641.74 = 665.48 : x
  2. Step 2: Convert to fraction form
    1,761.08/2,641.74 = 665.48/x
  3. Step 3: Cross multiply
    1,761.08x = 2,641.74 × 665.48
  4. Step 4: Simplify right side
    1,761.08x = 1,758,025.14
  5. Step 5: Solve for x
    x = 1,758,025.14/1,761.08
  6. Step 6: Final answer
    x = 998.27

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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.