Home / 689,405.70-1,034,108.55-512,258.70

Finding the Fourth Proportional to 689,405.70, 1,034,108.55 and 512,258.70

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Solution

The fourth proportional to 689,405.70, 1,034,108.55 and 512,258.70 is: 768,388.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,405.70 : 1,034,108.55 = 512,258.70 : x
  2. Step 2: Convert to fraction form
    689,405.70/1,034,108.55 = 512,258.70/x
  3. Step 3: Cross multiply
    689,405.70x = 1,034,108.55 × 512,258.70
  4. Step 4: Simplify right side
    689,405.70x = 529,731,101,481.89
  5. Step 5: Solve for x
    x = 529,731,101,481.89/689,405.70
  6. Step 6: Final answer
    x = 768,388.05

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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.