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Finding the Fourth Proportional to 803.31, 1,108.20 and 471.73

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Solution

The fourth proportional to 803.31, 1,108.20 and 471.73 is: 650.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    803.31 : 1,108.20 = 471.73 : x
  2. Step 2: Convert to fraction form
    803.31/1,108.20 = 471.73/x
  3. Step 3: Cross multiply
    803.31x = 1,108.20 × 471.73
  4. Step 4: Simplify right side
    803.31x = 522,771.19
  5. Step 5: Solve for x
    x = 522,771.19/803.31
  6. Step 6: Final answer
    x = 650.77

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.