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Finding the Fourth Proportional to 666.55, 998.88 and 300.43

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Solution

The fourth proportional to 666.55, 998.88 and 300.43 is: 450.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    666.55 : 998.88 = 300.43 : x
  2. Step 2: Convert to fraction form
    666.55/998.88 = 300.43/x
  3. Step 3: Cross multiply
    666.55x = 998.88 × 300.43
  4. Step 4: Simplify right side
    666.55x = 300,093.52
  5. Step 5: Solve for x
    x = 300,093.52/666.55
  6. Step 6: Final answer
    x = 450.22

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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.