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Finding the Fourth Proportional to 940.73, 1,299.44 and 722.37

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Solution

The fourth proportional to 940.73, 1,299.44 and 722.37 is: 997.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    940.73 : 1,299.44 = 722.37 : x
  2. Step 2: Convert to fraction form
    940.73/1,299.44 = 722.37/x
  3. Step 3: Cross multiply
    940.73x = 1,299.44 × 722.37
  4. Step 4: Simplify right side
    940.73x = 938,672.86
  5. Step 5: Solve for x
    x = 938,672.86/940.73
  6. Step 6: Final answer
    x = 997.82

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Double scale
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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.