Home / 685,143.14-945,499.38-379,240.58

Finding the Fourth Proportional to 685,143.14, 945,499.38 and 379,240.58

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Solution

The fourth proportional to 685,143.14, 945,499.38 and 379,240.58 is: 523,353.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,143.14 : 945,499.38 = 379,240.58 : x
  2. Step 2: Convert to fraction form
    685,143.14/945,499.38 = 379,240.58/x
  3. Step 3: Cross multiply
    685,143.14x = 945,499.38 × 379,240.58
  4. Step 4: Simplify right side
    685,143.14x = 358,571,733,260.84
  5. Step 5: Solve for x
    x = 358,571,733,260.84/685,143.14
  6. Step 6: Final answer
    x = 523,353.02

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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.