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Finding the Fourth Proportional to 836.10, 1,254.15 and 447.30

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Solution

The fourth proportional to 836.10, 1,254.15 and 447.30 is: 670.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    836.10 : 1,254.15 = 447.30 : x
  2. Step 2: Convert to fraction form
    836.10/1,254.15 = 447.30/x
  3. Step 3: Cross multiply
    836.10x = 1,254.15 × 447.30
  4. Step 4: Simplify right side
    836.10x = 560,981.30
  5. Step 5: Solve for x
    x = 560,981.30/836.10
  6. Step 6: Final answer
    x = 670.95

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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.