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Finding the Fourth Proportional to 803.14, 1,202.42 and 620.89

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Solution

The fourth proportional to 803.14, 1,202.42 and 620.89 is: 929.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    803.14 : 1,202.42 = 620.89 : x
  2. Step 2: Convert to fraction form
    803.14/1,202.42 = 620.89/x
  3. Step 3: Cross multiply
    803.14x = 1,202.42 × 620.89
  4. Step 4: Simplify right side
    803.14x = 746,570.55
  5. Step 5: Solve for x
    x = 746,570.55/803.14
  6. Step 6: Final answer
    x = 929.56

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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.