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Finding the Fourth Proportional to 662.45, 914.31 and 382.87

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Solution

The fourth proportional to 662.45, 914.31 and 382.87 is: 528.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    662.45 : 914.31 = 382.87 : x
  2. Step 2: Convert to fraction form
    662.45/914.31 = 382.87/x
  3. Step 3: Cross multiply
    662.45x = 914.31 × 382.87
  4. Step 4: Simplify right side
    662.45x = 350,061.87
  5. Step 5: Solve for x
    x = 350,061.87/662.45
  6. Step 6: Final answer
    x = 528.44

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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.