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Finding the Fourth Proportional to 388.27, 581.58 and 279.73

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Solution

The fourth proportional to 388.27, 581.58 and 279.73 is: 419.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    388.27 : 581.58 = 279.73 : x
  2. Step 2: Convert to fraction form
    388.27/581.58 = 279.73/x
  3. Step 3: Cross multiply
    388.27x = 581.58 × 279.73
  4. Step 4: Simplify right side
    388.27x = 162,685.37
  5. Step 5: Solve for x
    x = 162,685.37/388.27
  6. Step 6: Final answer
    x = 419.00

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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.