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Finding the Fourth Proportional to 727.23, 1,003.51 and 408.21

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Solution

The fourth proportional to 727.23, 1,003.51 and 408.21 is: 563.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    727.23 : 1,003.51 = 408.21 : x
  2. Step 2: Convert to fraction form
    727.23/1,003.51 = 408.21/x
  3. Step 3: Cross multiply
    727.23x = 1,003.51 × 408.21
  4. Step 4: Simplify right side
    727.23x = 409,649.18
  5. Step 5: Solve for x
    x = 409,649.18/727.23
  6. Step 6: Final answer
    x = 563.30

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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.