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Finding the Fourth Proportional to 663.36, 995.40 and 407.04

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Solution

The fourth proportional to 663.36, 995.40 and 407.04 is: 610.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    663.36 : 995.40 = 407.04 : x
  2. Step 2: Convert to fraction form
    663.36/995.40 = 407.04/x
  3. Step 3: Cross multiply
    663.36x = 995.40 × 407.04
  4. Step 4: Simplify right side
    663.36x = 405,167.62
  5. Step 5: Solve for x
    x = 405,167.62/663.36
  6. Step 6: Final answer
    x = 610.78

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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.