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Finding the Fourth Proportional to 662.71, 914.54 and 382.89

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Solution

The fourth proportional to 662.71, 914.54 and 382.89 is: 528.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    662.71 : 914.54 = 382.89 : x
  2. Step 2: Convert to fraction form
    662.71/914.54 = 382.89/x
  3. Step 3: Cross multiply
    662.71x = 914.54 × 382.89
  4. Step 4: Simplify right side
    662.71x = 350,169.18
  5. Step 5: Solve for x
    x = 350,169.18/662.71
  6. Step 6: Final answer
    x = 528.39

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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.