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Finding the Fourth Proportional to 388.12, 581.64 and 182.20

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Solution

The fourth proportional to 388.12, 581.64 and 182.20 is: 273.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    388.12 : 581.64 = 182.20 : x
  2. Step 2: Convert to fraction form
    388.12/581.64 = 182.20/x
  3. Step 3: Cross multiply
    388.12x = 581.64 × 182.20
  4. Step 4: Simplify right side
    388.12x = 105,974.81
  5. Step 5: Solve for x
    x = 105,974.81/388.12
  6. Step 6: Final answer
    x = 273.05

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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.