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Finding the Fourth Proportional to 995.03, 1,491.38 and 665.58

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Solution

The fourth proportional to 995.03, 1,491.38 and 665.58 is: 997.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    995.03 : 1,491.38 = 665.58 : x
  2. Step 2: Convert to fraction form
    995.03/1,491.38 = 665.58/x
  3. Step 3: Cross multiply
    995.03x = 1,491.38 × 665.58
  4. Step 4: Simplify right side
    995.03x = 992,632.70
  5. Step 5: Solve for x
    x = 992,632.70/995.03
  6. Step 6: Final answer
    x = 997.59

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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.