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Finding the Fourth Proportional to 378.86, 568.29 and 104.99

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Solution

The fourth proportional to 378.86, 568.29 and 104.99 is: 157.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    378.86 : 568.29 = 104.99 : x
  2. Step 2: Convert to fraction form
    378.86/568.29 = 104.99/x
  3. Step 3: Cross multiply
    378.86x = 568.29 × 104.99
  4. Step 4: Simplify right side
    378.86x = 59,664.77
  5. Step 5: Solve for x
    x = 59,664.77/378.86
  6. Step 6: Final answer
    x = 157.49

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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.