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Finding the Fourth Proportional to 662.42, 914.28 and 488.18

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Solution

The fourth proportional to 662.42, 914.28 and 488.18 is: 673.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    662.42 : 914.28 = 488.18 : x
  2. Step 2: Convert to fraction form
    662.42/914.28 = 488.18/x
  3. Step 3: Cross multiply
    662.42x = 914.28 × 488.18
  4. Step 4: Simplify right side
    662.42x = 446,333.21
  5. Step 5: Solve for x
    x = 446,333.21/662.42
  6. Step 6: Final answer
    x = 673.79

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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.