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Finding the Fourth Proportional to 1,760.43, 2,640.65 and 1,021.21

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Solution

The fourth proportional to 1,760.43, 2,640.65 and 1,021.21 is: 1,531.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,760.43 : 2,640.65 = 1,021.21 : x
  2. Step 2: Convert to fraction form
    1,760.43/2,640.65 = 1,021.21/x
  3. Step 3: Cross multiply
    1,760.43x = 2,640.65 × 1,021.21
  4. Step 4: Simplify right side
    1,760.43x = 2,696,652.22
  5. Step 5: Solve for x
    x = 2,696,652.22/1,760.43
  6. Step 6: Final answer
    x = 1,531.81

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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.