Home / 689,904,313.20-1,034,856,469.80-621,879,865.20

Finding the Fourth Proportional to 689,904,313.20, 1,034,856,469.80 and 621,879,865.20

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Solution

The fourth proportional to 689,904,313.20, 1,034,856,469.80 and 621,879,865.20 is: 932,819,797.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,904,313.20 : 1,034,856,469.80 = 621,879,865.20 : x
  2. Step 2: Convert to fraction form
    689,904,313.20/1,034,856,469.80 = 621,879,865.20/x
  3. Step 3: Cross multiply
    689,904,313.20x = 1,034,856,469.80 × 621,879,865.20
  4. Step 4: Simplify right side
    689,904,313.20x = 643,556,401,940,571,904
  5. Step 5: Solve for x
    x = 643,556,401,940,571,904/689,904,313.20
  6. Step 6: Final answer
    x = 932,819,797.80

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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.