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Finding the Fourth Proportional to 666.45, 1,000.36 and 481.93

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Solution

The fourth proportional to 666.45, 1,000.36 and 481.93 is: 723.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    666.45 : 1,000.36 = 481.93 : x
  2. Step 2: Convert to fraction form
    666.45/1,000.36 = 481.93/x
  3. Step 3: Cross multiply
    666.45x = 1,000.36 × 481.93
  4. Step 4: Simplify right side
    666.45x = 482,103.49
  5. Step 5: Solve for x
    x = 482,103.49/666.45
  6. Step 6: Final answer
    x = 723.39

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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.