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Finding the Fourth Proportional to 666, 918.18 and 488.82

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Solution

The fourth proportional to 666, 918.18 and 488.82 is: 673.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    666 : 918.18 = 488.82 : x
  2. Step 2: Convert to fraction form
    666/918.18 = 488.82/x
  3. Step 3: Cross multiply
    666x = 918.18 × 488.82
  4. Step 4: Simplify right side
    666x = 448,824.75
  5. Step 5: Solve for x
    x = 448,824.75/666
  6. Step 6: Final answer
    x = 673.91

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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.