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Finding the Fourth Proportional to 803.05, 1,202.59 and 663.37

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Solution

The fourth proportional to 803.05, 1,202.59 and 663.37 is: 993.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    803.05 : 1,202.59 = 663.37 : x
  2. Step 2: Convert to fraction form
    803.05/1,202.59 = 663.37/x
  3. Step 3: Cross multiply
    803.05x = 1,202.59 × 663.37
  4. Step 4: Simplify right side
    803.05x = 797,762.96
  5. Step 5: Solve for x
    x = 797,762.96/803.05
  6. Step 6: Final answer
    x = 993.42

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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.