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Finding the Fourth Proportional to 388.95, 533.45 and 369.15

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Solution

The fourth proportional to 388.95, 533.45 and 369.15 is: 506.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    388.95 : 533.45 = 369.15 : x
  2. Step 2: Convert to fraction form
    388.95/533.45 = 369.15/x
  3. Step 3: Cross multiply
    388.95x = 533.45 × 369.15
  4. Step 4: Simplify right side
    388.95x = 196,921.22
  5. Step 5: Solve for x
    x = 196,921.22/388.95
  6. Step 6: Final answer
    x = 506.29

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.