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Finding the Fourth Proportional to 388.47, 583.39 and 227.18

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Solution

The fourth proportional to 388.47, 583.39 and 227.18 is: 341.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    388.47 : 583.39 = 227.18 : x
  2. Step 2: Convert to fraction form
    388.47/583.39 = 227.18/x
  3. Step 3: Cross multiply
    388.47x = 583.39 × 227.18
  4. Step 4: Simplify right side
    388.47x = 132,534.54
  5. Step 5: Solve for x
    x = 132,534.54/388.47
  6. Step 6: Final answer
    x = 341.17

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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.