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Finding the Fourth Proportional to 289.76, 400.74 and 250.46

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Solution

The fourth proportional to 289.76, 400.74 and 250.46 is: 346.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    289.76 : 400.74 = 250.46 : x
  2. Step 2: Convert to fraction form
    289.76/400.74 = 250.46/x
  3. Step 3: Cross multiply
    289.76x = 400.74 × 250.46
  4. Step 4: Simplify right side
    289.76x = 100,369.34
  5. Step 5: Solve for x
    x = 100,369.34/289.76
  6. Step 6: Final answer
    x = 346.39

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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.