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Finding the Fourth Proportional to 388.17, 534.15 and 377.96

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Solution

The fourth proportional to 388.17, 534.15 and 377.96 is: 520.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    388.17 : 534.15 = 377.96 : x
  2. Step 2: Convert to fraction form
    388.17/534.15 = 377.96/x
  3. Step 3: Cross multiply
    388.17x = 534.15 × 377.96
  4. Step 4: Simplify right side
    388.17x = 201,884.66
  5. Step 5: Solve for x
    x = 201,884.66/388.17
  6. Step 6: Final answer
    x = 520.09

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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.