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Finding the Fourth Proportional to 378.77, 522.32 and 268.02

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Solution

The fourth proportional to 378.77, 522.32 and 268.02 is: 369.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    378.77 : 522.32 = 268.02 : x
  2. Step 2: Convert to fraction form
    378.77/522.32 = 268.02/x
  3. Step 3: Cross multiply
    378.77x = 522.32 × 268.02
  4. Step 4: Simplify right side
    378.77x = 139,990.87
  5. Step 5: Solve for x
    x = 139,990.87/378.77
  6. Step 6: Final answer
    x = 369.60

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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.