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Finding the Fourth Proportional to 388.97, 583.09 and 251.61

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Solution

The fourth proportional to 388.97, 583.09 and 251.61 is: 377.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    388.97 : 583.09 = 251.61 : x
  2. Step 2: Convert to fraction form
    388.97/583.09 = 251.61/x
  3. Step 3: Cross multiply
    388.97x = 583.09 × 251.61
  4. Step 4: Simplify right side
    388.97x = 146,708.36
  5. Step 5: Solve for x
    x = 146,708.36/388.97
  6. Step 6: Final answer
    x = 377.17

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.