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Finding the Fourth Proportional to 579,819.60, 869,729.40 and 280,443.60

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Solution

The fourth proportional to 579,819.60, 869,729.40 and 280,443.60 is: 420,665.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,819.60 : 869,729.40 = 280,443.60 : x
  2. Step 2: Convert to fraction form
    579,819.60/869,729.40 = 280,443.60/x
  3. Step 3: Cross multiply
    579,819.60x = 869,729.40 × 280,443.60
  4. Step 4: Simplify right side
    579,819.60x = 243,910,043,961.84
  5. Step 5: Solve for x
    x = 243,910,043,961.84/579,819.60
  6. Step 6: Final answer
    x = 420,665.40

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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.