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Finding the Fourth Proportional to 727.44, 1,092.38 and 649.48

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Solution

The fourth proportional to 727.44, 1,092.38 and 649.48 is: 975.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    727.44 : 1,092.38 = 649.48 : x
  2. Step 2: Convert to fraction form
    727.44/1,092.38 = 649.48/x
  3. Step 3: Cross multiply
    727.44x = 1,092.38 × 649.48
  4. Step 4: Simplify right side
    727.44x = 709,478.96
  5. Step 5: Solve for x
    x = 709,478.96/727.44
  6. Step 6: Final answer
    x = 975.31

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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.