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Finding the Fourth Proportional to 667.78, 1,001.70 and 283

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Solution

The fourth proportional to 667.78, 1,001.70 and 283 is: 424.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    667.78 : 1,001.70 = 283 : x
  2. Step 2: Convert to fraction form
    667.78/1,001.70 = 283/x
  3. Step 3: Cross multiply
    667.78x = 1,001.70 × 283
  4. Step 4: Simplify right side
    667.78x = 283,481.10
  5. Step 5: Solve for x
    x = 283,481.10/667.78
  6. Step 6: Final answer
    x = 424.51

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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.