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Finding the Fourth Proportional to 1,761.24, 2,642.10 and 665.40

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Solution

The fourth proportional to 1,761.24, 2,642.10 and 665.40 is: 998.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,761.24 : 2,642.10 = 665.40 : x
  2. Step 2: Convert to fraction form
    1,761.24/2,642.10 = 665.40/x
  3. Step 3: Cross multiply
    1,761.24x = 2,642.10 × 665.40
  4. Step 4: Simplify right side
    1,761.24x = 1,758,053.34
  5. Step 5: Solve for x
    x = 1,758,053.34/1,761.24
  6. Step 6: Final answer
    x = 998.19

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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.