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Finding the Fourth Proportional to 804.17, 1,206.20 and 219.15

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Solution

The fourth proportional to 804.17, 1,206.20 and 219.15 is: 328.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    804.17 : 1,206.20 = 219.15 : x
  2. Step 2: Convert to fraction form
    804.17/1,206.20 = 219.15/x
  3. Step 3: Cross multiply
    804.17x = 1,206.20 × 219.15
  4. Step 4: Simplify right side
    804.17x = 264,339.28
  5. Step 5: Solve for x
    x = 264,339.28/804.17
  6. Step 6: Final answer
    x = 328.71

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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.