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Finding the Fourth Proportional to 293.44, 406.79 and 288.40

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Solution

The fourth proportional to 293.44, 406.79 and 288.40 is: 399.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    293.44 : 406.79 = 288.40 : x
  2. Step 2: Convert to fraction form
    293.44/406.79 = 288.40/x
  3. Step 3: Cross multiply
    293.44x = 406.79 × 288.40
  4. Step 4: Simplify right side
    293.44x = 117,318.24
  5. Step 5: Solve for x
    x = 117,318.24/293.44
  6. Step 6: Final answer
    x = 399.80

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.