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Finding the Fourth Proportional to 836.73, 1,255.35 and 259.61

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Solution

The fourth proportional to 836.73, 1,255.35 and 259.61 is: 389.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    836.73 : 1,255.35 = 259.61 : x
  2. Step 2: Convert to fraction form
    836.73/1,255.35 = 259.61/x
  3. Step 3: Cross multiply
    836.73x = 1,255.35 × 259.61
  4. Step 4: Simplify right side
    836.73x = 325,895.14
  5. Step 5: Solve for x
    x = 325,895.14/836.73
  6. Step 6: Final answer
    x = 389.49

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Double scale
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1.5x scale

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.