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Finding the Fourth Proportional to 378.38, 566.46 and 287.44

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Solution

The fourth proportional to 378.38, 566.46 and 287.44 is: 430.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    378.38 : 566.46 = 287.44 : x
  2. Step 2: Convert to fraction form
    378.38/566.46 = 287.44/x
  3. Step 3: Cross multiply
    378.38x = 566.46 × 287.44
  4. Step 4: Simplify right side
    378.38x = 162,823.26
  5. Step 5: Solve for x
    x = 162,823.26/378.38
  6. Step 6: Final answer
    x = 430.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.