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Finding the Fourth Proportional to 394.66, 544.60 and 290.18

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Solution

The fourth proportional to 394.66, 544.60 and 290.18 is: 400.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    394.66 : 544.60 = 290.18 : x
  2. Step 2: Convert to fraction form
    394.66/544.60 = 290.18/x
  3. Step 3: Cross multiply
    394.66x = 544.60 × 290.18
  4. Step 4: Simplify right side
    394.66x = 158,032.03
  5. Step 5: Solve for x
    x = 158,032.03/394.66
  6. Step 6: Final answer
    x = 400.43

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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.