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Finding the Fourth Proportional to 727.53, 1,001.79 and 621.82

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Solution

The fourth proportional to 727.53, 1,001.79 and 621.82 is: 856.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    727.53 : 1,001.79 = 621.82 : x
  2. Step 2: Convert to fraction form
    727.53/1,001.79 = 621.82/x
  3. Step 3: Cross multiply
    727.53x = 1,001.79 × 621.82
  4. Step 4: Simplify right side
    727.53x = 622,933.06
  5. Step 5: Solve for x
    x = 622,933.06/727.53
  6. Step 6: Final answer
    x = 856.23

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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.