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Finding the Fourth Proportional to 289.39, 398.01 and 252.58

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Solution

The fourth proportional to 289.39, 398.01 and 252.58 is: 347.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    289.39 : 398.01 = 252.58 : x
  2. Step 2: Convert to fraction form
    289.39/398.01 = 252.58/x
  3. Step 3: Cross multiply
    289.39x = 398.01 × 252.58
  4. Step 4: Simplify right side
    289.39x = 100,529.37
  5. Step 5: Solve for x
    x = 100,529.37/289.39
  6. Step 6: Final answer
    x = 347.38

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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.