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Finding the Fourth Proportional to 666.11, 998.82 and 458.19

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Solution

The fourth proportional to 666.11, 998.82 and 458.19 is: 687.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    666.11 : 998.82 = 458.19 : x
  2. Step 2: Convert to fraction form
    666.11/998.82 = 458.19/x
  3. Step 3: Cross multiply
    666.11x = 998.82 × 458.19
  4. Step 4: Simplify right side
    666.11x = 457,649.34
  5. Step 5: Solve for x
    x = 457,649.34/666.11
  6. Step 6: Final answer
    x = 687.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.