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Finding the Fourth Proportional to 616.09, 849.90 and 394.81

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Solution

The fourth proportional to 616.09, 849.90 and 394.81 is: 544.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    616.09 : 849.90 = 394.81 : x
  2. Step 2: Convert to fraction form
    616.09/849.90 = 394.81/x
  3. Step 3: Cross multiply
    616.09x = 849.90 × 394.81
  4. Step 4: Simplify right side
    616.09x = 335,549.02
  5. Step 5: Solve for x
    x = 335,549.02/616.09
  6. Step 6: Final answer
    x = 544.64

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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.