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Finding the Fourth Proportional to 809.64, 1,214.24 and 224.50

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Solution

The fourth proportional to 809.64, 1,214.24 and 224.50 is: 336.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    809.64 : 1,214.24 = 224.50 : x
  2. Step 2: Convert to fraction form
    809.64/1,214.24 = 224.50/x
  3. Step 3: Cross multiply
    809.64x = 1,214.24 × 224.50
  4. Step 4: Simplify right side
    809.64x = 272,598.12
  5. Step 5: Solve for x
    x = 272,598.12/809.64
  6. Step 6: Final answer
    x = 336.69

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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.