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Finding the Fourth Proportional to 849.92, 1,272.32 and 719.36

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Solution

The fourth proportional to 849.92, 1,272.32 and 719.36 is: 1,076.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    849.92 : 1,272.32 = 719.36 : x
  2. Step 2: Convert to fraction form
    849.92/1,272.32 = 719.36/x
  3. Step 3: Cross multiply
    849.92x = 1,272.32 × 719.36
  4. Step 4: Simplify right side
    849.92x = 915,256.12
  5. Step 5: Solve for x
    x = 915,256.12/849.92
  6. Step 6: Final answer
    x = 1,076.87

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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.