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Finding the Fourth Proportional to 547,487.60, 821,231.40 and 485,279.60

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Solution

The fourth proportional to 547,487.60, 821,231.40 and 485,279.60 is: 727,919.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    547,487.60 : 821,231.40 = 485,279.60 : x
  2. Step 2: Convert to fraction form
    547,487.60/821,231.40 = 485,279.60/x
  3. Step 3: Cross multiply
    547,487.60x = 821,231.40 × 485,279.60
  4. Step 4: Simplify right side
    547,487.60x = 398,526,845,299.44
  5. Step 5: Solve for x
    x = 398,526,845,299.44/547,487.60
  6. Step 6: Final answer
    x = 727,919.40

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Double scale
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Similar ratio
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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.