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Finding the Fourth Proportional to 378.89, 522.86 and 268.55

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Solution

The fourth proportional to 378.89, 522.86 and 268.55 is: 370.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    378.89 : 522.86 = 268.55 : x
  2. Step 2: Convert to fraction form
    378.89/522.86 = 268.55/x
  3. Step 3: Cross multiply
    378.89x = 522.86 × 268.55
  4. Step 4: Simplify right side
    378.89x = 140,412.71
  5. Step 5: Solve for x
    x = 140,412.71/378.89
  6. Step 6: Final answer
    x = 370.59

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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.