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Finding the Fourth Proportional to 289.37, 397.00 and 281.68

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Solution

The fourth proportional to 289.37, 397.00 and 281.68 is: 386.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    289.37 : 397.00 = 281.68 : x
  2. Step 2: Convert to fraction form
    289.37/397.00 = 281.68/x
  3. Step 3: Cross multiply
    289.37x = 397.00 × 281.68
  4. Step 4: Simplify right side
    289.37x = 111,826.32
  5. Step 5: Solve for x
    x = 111,826.32/289.37
  6. Step 6: Final answer
    x = 386.44

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.