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Finding the Fourth Proportional to 394.80, 544.80 and 301.59

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Solution

The fourth proportional to 394.80, 544.80 and 301.59 is: 416.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    394.80 : 544.80 = 301.59 : x
  2. Step 2: Convert to fraction form
    394.80/544.80 = 301.59/x
  3. Step 3: Cross multiply
    394.80x = 544.80 × 301.59
  4. Step 4: Simplify right side
    394.80x = 164,306.23
  5. Step 5: Solve for x
    x = 164,306.23/394.80
  6. Step 6: Final answer
    x = 416.18

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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.