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Finding the Fourth Proportional to 388.11, 535.15 and 277.54

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Solution

The fourth proportional to 388.11, 535.15 and 277.54 is: 382.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    388.11 : 535.15 = 277.54 : x
  2. Step 2: Convert to fraction form
    388.11/535.15 = 277.54/x
  3. Step 3: Cross multiply
    388.11x = 535.15 × 277.54
  4. Step 4: Simplify right side
    388.11x = 148,525.53
  5. Step 5: Solve for x
    x = 148,525.53/388.11
  6. Step 6: Final answer
    x = 382.69

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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.