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Finding the Fourth Proportional to 667.07, 1,005.60 and 622.47

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Solution

The fourth proportional to 667.07, 1,005.60 and 622.47 is: 938.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    667.07 : 1,005.60 = 622.47 : x
  2. Step 2: Convert to fraction form
    667.07/1,005.60 = 622.47/x
  3. Step 3: Cross multiply
    667.07x = 1,005.60 × 622.47
  4. Step 4: Simplify right side
    667.07x = 625,952.78
  5. Step 5: Solve for x
    x = 625,952.78/667.07
  6. Step 6: Final answer
    x = 938.36

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.