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Finding the Fourth Proportional to 666.46, 1,000.22 and 301.28

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Solution

The fourth proportional to 666.46, 1,000.22 and 301.28 is: 452.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    666.46 : 1,000.22 = 301.28 : x
  2. Step 2: Convert to fraction form
    666.46/1,000.22 = 301.28/x
  3. Step 3: Cross multiply
    666.46x = 1,000.22 × 301.28
  4. Step 4: Simplify right side
    666.46x = 301,343.34
  5. Step 5: Solve for x
    x = 301,343.34/666.46
  6. Step 6: Final answer
    x = 452.16

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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.