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Finding the Fourth Proportional to 836.19, 1,255.06 and 425.63

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Solution

The fourth proportional to 836.19, 1,255.06 and 425.63 is: 638.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    836.19 : 1,255.06 = 425.63 : x
  2. Step 2: Convert to fraction form
    836.19/1,255.06 = 425.63/x
  3. Step 3: Cross multiply
    836.19x = 1,255.06 × 425.63
  4. Step 4: Simplify right side
    836.19x = 534,185.44
  5. Step 5: Solve for x
    x = 534,185.44/836.19
  6. Step 6: Final answer
    x = 638.83

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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.