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Finding the Fourth Proportional to 803.52, 1,202.10 and 639.52

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Solution

The fourth proportional to 803.52, 1,202.10 and 639.52 is: 956.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    803.52 : 1,202.10 = 639.52 : x
  2. Step 2: Convert to fraction form
    803.52/1,202.10 = 639.52/x
  3. Step 3: Cross multiply
    803.52x = 1,202.10 × 639.52
  4. Step 4: Simplify right side
    803.52x = 768,766.99
  5. Step 5: Solve for x
    x = 768,766.99/803.52
  6. Step 6: Final answer
    x = 956.75

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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.