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Finding the Fourth Proportional to 1,116.73, 1,540.26 and 940.63

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Solution

The fourth proportional to 1,116.73, 1,540.26 and 940.63 is: 1,297.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,116.73 : 1,540.26 = 940.63 : x
  2. Step 2: Convert to fraction form
    1,116.73/1,540.26 = 940.63/x
  3. Step 3: Cross multiply
    1,116.73x = 1,540.26 × 940.63
  4. Step 4: Simplify right side
    1,116.73x = 1,448,814.76
  5. Step 5: Solve for x
    x = 1,448,814.76/1,116.73
  6. Step 6: Final answer
    x = 1,297.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.