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Finding the Fourth Proportional to 686.63, 1,030.11 and 224.43

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Solution

The fourth proportional to 686.63, 1,030.11 and 224.43 is: 336.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    686.63 : 1,030.11 = 224.43 : x
  2. Step 2: Convert to fraction form
    686.63/1,030.11 = 224.43/x
  3. Step 3: Cross multiply
    686.63x = 1,030.11 × 224.43
  4. Step 4: Simplify right side
    686.63x = 231,181.31
  5. Step 5: Solve for x
    x = 231,181.31/686.63
  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.