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Finding the Fourth Proportional to 394.67, 544.42 and 284.01

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Solution

The fourth proportional to 394.67, 544.42 and 284.01 is: 391.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    394.67 : 544.42 = 284.01 : x
  2. Step 2: Convert to fraction form
    394.67/544.42 = 284.01/x
  3. Step 3: Cross multiply
    394.67x = 544.42 × 284.01
  4. Step 4: Simplify right side
    394.67x = 154,619.04
  5. Step 5: Solve for x
    x = 154,619.04/394.67
  6. Step 6: Final answer
    x = 391.77

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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.