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Finding the Fourth Proportional to 666.97, 1,000.49 and 628.49

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Solution

The fourth proportional to 666.97, 1,000.49 and 628.49 is: 942.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    666.97 : 1,000.49 = 628.49 : x
  2. Step 2: Convert to fraction form
    666.97/1,000.49 = 628.49/x
  3. Step 3: Cross multiply
    666.97x = 1,000.49 × 628.49
  4. Step 4: Simplify right side
    666.97x = 628,797.32
  5. Step 5: Solve for x
    x = 628,797.32/666.97
  6. Step 6: Final answer
    x = 942.77

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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.