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Finding the Fourth Proportional to 665.33, 1,000.15 and 662.09

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Solution

The fourth proportional to 665.33, 1,000.15 and 662.09 is: 995.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    665.33 : 1,000.15 = 662.09 : x
  2. Step 2: Convert to fraction form
    665.33/1,000.15 = 662.09/x
  3. Step 3: Cross multiply
    665.33x = 1,000.15 × 662.09
  4. Step 4: Simplify right side
    665.33x = 662,182.66
  5. Step 5: Solve for x
    x = 662,182.66/665.33
  6. Step 6: Final answer
    x = 995.28

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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.