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Finding the Fourth Proportional to 997.65, 1,496.42 and 442.20

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Solution

The fourth proportional to 997.65, 1,496.42 and 442.20 is: 663.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    997.65 : 1,496.42 = 442.20 : x
  2. Step 2: Convert to fraction form
    997.65/1,496.42 = 442.20/x
  3. Step 3: Cross multiply
    997.65x = 1,496.42 × 442.20
  4. Step 4: Simplify right side
    997.65x = 661,714.50
  5. Step 5: Solve for x
    x = 661,714.50/997.65
  6. Step 6: Final answer
    x = 663.27

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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.