Home / 685,214.12-945,621.22-383,410.28

Finding the Fourth Proportional to 685,214.12, 945,621.22 and 383,410.28

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Solution

The fourth proportional to 685,214.12, 945,621.22 and 383,410.28 is: 529,120.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,214.12 : 945,621.22 = 383,410.28 : x
  2. Step 2: Convert to fraction form
    685,214.12/945,621.22 = 383,410.28/x
  3. Step 3: Cross multiply
    685,214.12x = 945,621.22 × 383,410.28
  4. Step 4: Simplify right side
    685,214.12x = 362,560,896,734.14
  5. Step 5: Solve for x
    x = 362,560,896,734.14/685,214.12
  6. Step 6: Final answer
    x = 529,120.59

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.