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Finding the Fourth Proportional to 288.82, 398.30 and 183.88

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Solution

The fourth proportional to 288.82, 398.30 and 183.88 is: 253.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    288.82 : 398.30 = 183.88 : x
  2. Step 2: Convert to fraction form
    288.82/398.30 = 183.88/x
  3. Step 3: Cross multiply
    288.82x = 398.30 × 183.88
  4. Step 4: Simplify right side
    288.82x = 73,239.40
  5. Step 5: Solve for x
    x = 73,239.40/288.82
  6. Step 6: Final answer
    x = 253.58

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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.