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Finding the Fourth Proportional to 289.22, 398.68 and 265.39

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Solution

The fourth proportional to 289.22, 398.68 and 265.39 is: 365.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    289.22 : 398.68 = 265.39 : x
  2. Step 2: Convert to fraction form
    289.22/398.68 = 265.39/x
  3. Step 3: Cross multiply
    289.22x = 398.68 × 265.39
  4. Step 4: Simplify right side
    289.22x = 105,804.03
  5. Step 5: Solve for x
    x = 105,804.03/289.22
  6. Step 6: Final answer
    x = 365.82

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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.