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Finding the Fourth Proportional to 766.36, 1,055.73 and 719.38

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Solution

The fourth proportional to 766.36, 1,055.73 and 719.38 is: 991.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    766.36 : 1,055.73 = 719.38 : x
  2. Step 2: Convert to fraction form
    766.36/1,055.73 = 719.38/x
  3. Step 3: Cross multiply
    766.36x = 1,055.73 × 719.38
  4. Step 4: Simplify right side
    766.36x = 759,471.05
  5. Step 5: Solve for x
    x = 759,471.05/766.36
  6. Step 6: Final answer
    x = 991.01

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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.