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Finding the Fourth Proportional to 378.71, 568.29 and 159.32

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Solution

The fourth proportional to 378.71, 568.29 and 159.32 is: 239.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    378.71 : 568.29 = 159.32 : x
  2. Step 2: Convert to fraction form
    378.71/568.29 = 159.32/x
  3. Step 3: Cross multiply
    378.71x = 568.29 × 159.32
  4. Step 4: Simplify right side
    378.71x = 90,539.37
  5. Step 5: Solve for x
    x = 90,539.37/378.71
  6. Step 6: Final answer
    x = 239.07

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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.