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Finding the Fourth Proportional to 803.31, 1,204.62 and 316.23

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Solution

The fourth proportional to 803.31, 1,204.62 and 316.23 is: 474.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    803.31 : 1,204.62 = 316.23 : x
  2. Step 2: Convert to fraction form
    803.31/1,204.62 = 316.23/x
  3. Step 3: Cross multiply
    803.31x = 1,204.62 × 316.23
  4. Step 4: Simplify right side
    803.31x = 380,936.98
  5. Step 5: Solve for x
    x = 380,936.98/803.31
  6. Step 6: Final answer
    x = 474.21

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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.