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Finding the Fourth Proportional to 289.96, 399.81 and 265.39

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Solution

The fourth proportional to 289.96, 399.81 and 265.39 is: 365.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    289.96 : 399.81 = 265.39 : x
  2. Step 2: Convert to fraction form
    289.96/399.81 = 265.39/x
  3. Step 3: Cross multiply
    289.96x = 399.81 × 265.39
  4. Step 4: Simplify right side
    289.96x = 106,105.58
  5. Step 5: Solve for x
    x = 106,105.58/289.96
  6. Step 6: Final answer
    x = 365.93

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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.