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Finding the Fourth Proportional to 380.56, 528.79 and 376

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Solution

The fourth proportional to 380.56, 528.79 and 376 is: 522.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    380.56 : 528.79 = 376 : x
  2. Step 2: Convert to fraction form
    380.56/528.79 = 376/x
  3. Step 3: Cross multiply
    380.56x = 528.79 × 376
  4. Step 4: Simplify right side
    380.56x = 198,825.04
  5. Step 5: Solve for x
    x = 198,825.04/380.56
  6. Step 6: Final answer
    x = 522.45

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.