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Finding the Fourth Proportional to 836.60, 1,254.79 and 220.35

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Solution

The fourth proportional to 836.60, 1,254.79 and 220.35 is: 330.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    836.60 : 1,254.79 = 220.35 : x
  2. Step 2: Convert to fraction form
    836.60/1,254.79 = 220.35/x
  3. Step 3: Cross multiply
    836.60x = 1,254.79 × 220.35
  4. Step 4: Simplify right side
    836.60x = 276,486.70
  5. Step 5: Solve for x
    x = 276,486.70/836.60
  6. Step 6: Final answer
    x = 330.49

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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.