Home / 864,109.20-1,296,163.80-509,815.20

Finding the Fourth Proportional to 864,109.20, 1,296,163.80 and 509,815.20

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Solution

The fourth proportional to 864,109.20, 1,296,163.80 and 509,815.20 is: 764,722.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    864,109.20 : 1,296,163.80 = 509,815.20 : x
  2. Step 2: Convert to fraction form
    864,109.20/1,296,163.80 = 509,815.20/x
  3. Step 3: Cross multiply
    864,109.20x = 1,296,163.80 × 509,815.20
  4. Step 4: Simplify right side
    864,109.20x = 660,804,006,929.76
  5. Step 5: Solve for x
    x = 660,804,006,929.76/864,109.20
  6. Step 6: Final answer
    x = 764,722.80

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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.