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Finding the Fourth Proportional to 803.54, 1,205.10 and 226.28

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Solution

The fourth proportional to 803.54, 1,205.10 and 226.28 is: 339.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    803.54 : 1,205.10 = 226.28 : x
  2. Step 2: Convert to fraction form
    803.54/1,205.10 = 226.28/x
  3. Step 3: Cross multiply
    803.54x = 1,205.10 × 226.28
  4. Step 4: Simplify right side
    803.54x = 272,690.03
  5. Step 5: Solve for x
    x = 272,690.03/803.54
  6. Step 6: Final answer
    x = 339.36

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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.