Home / 689,406.20-1,034,109.30-512,259.20

Finding the Fourth Proportional to 689,406.20, 1,034,109.30 and 512,259.20

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Solution

The fourth proportional to 689,406.20, 1,034,109.30 and 512,259.20 is: 768,388.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,406.20 : 1,034,109.30 = 512,259.20 : x
  2. Step 2: Convert to fraction form
    689,406.20/1,034,109.30 = 512,259.20/x
  3. Step 3: Cross multiply
    689,406.20x = 1,034,109.30 × 512,259.20
  4. Step 4: Simplify right side
    689,406.20x = 529,732,002,730.56
  5. Step 5: Solve for x
    x = 529,732,002,730.56/689,406.20
  6. Step 6: Final answer
    x = 768,388.80

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Double scale
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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.