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Finding the Fourth Proportional to 662.79, 914.84 and 397.29

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Solution

The fourth proportional to 662.79, 914.84 and 397.29 is: 548.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    662.79 : 914.84 = 397.29 : x
  2. Step 2: Convert to fraction form
    662.79/914.84 = 397.29/x
  3. Step 3: Cross multiply
    662.79x = 914.84 × 397.29
  4. Step 4: Simplify right side
    662.79x = 363,454.80
  5. Step 5: Solve for x
    x = 363,454.80/662.79
  6. Step 6: Final answer
    x = 548.37

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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.