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Finding the Fourth Proportional to 1,761.41, 2,646.90 and 940.28

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Solution

The fourth proportional to 1,761.41, 2,646.90 and 940.28 is: 1,412.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,761.41 : 2,646.90 = 940.28 : x
  2. Step 2: Convert to fraction form
    1,761.41/2,646.90 = 940.28/x
  3. Step 3: Cross multiply
    1,761.41x = 2,646.90 × 940.28
  4. Step 4: Simplify right side
    1,761.41x = 2,488,813.90
  5. Step 5: Solve for x
    x = 2,488,813.90/1,761.41
  6. Step 6: Final answer
    x = 1,412.96

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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.