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Finding the Fourth Proportional to 940.22, 1,296.93 and 719.09

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Solution

The fourth proportional to 940.22, 1,296.93 and 719.09 is: 991.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    940.22 : 1,296.93 = 719.09 : x
  2. Step 2: Convert to fraction form
    940.22/1,296.93 = 719.09/x
  3. Step 3: Cross multiply
    940.22x = 1,296.93 × 719.09
  4. Step 4: Simplify right side
    940.22x = 932,609.39
  5. Step 5: Solve for x
    x = 932,609.39/940.22
  6. Step 6: Final answer
    x = 991.91

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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.