Home / 864,099.20-1,296,148.80-509,805.20

Finding the Fourth Proportional to 864,099.20, 1,296,148.80 and 509,805.20

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Solution

The fourth proportional to 864,099.20, 1,296,148.80 and 509,805.20 is: 764,707.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    864,099.20 : 1,296,148.80 = 509,805.20 : x
  2. Step 2: Convert to fraction form
    864,099.20/1,296,148.80 = 509,805.20/x
  3. Step 3: Cross multiply
    864,099.20x = 1,296,148.80 × 509,805.20
  4. Step 4: Simplify right side
    864,099.20x = 660,783,398,213.76
  5. Step 5: Solve for x
    x = 660,783,398,213.76/864,099.20
  6. Step 6: Final answer
    x = 764,707.80

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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.