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Finding the Fourth Proportional to 685,180.90, 945,475.66 and 379,208.66

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Solution

The fourth proportional to 685,180.90, 945,475.66 and 379,208.66 is: 523,267.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,180.90 : 945,475.66 = 379,208.66 : x
  2. Step 2: Convert to fraction form
    685,180.90/945,475.66 = 379,208.66/x
  3. Step 3: Cross multiply
    685,180.90x = 945,475.66 × 379,208.66
  4. Step 4: Simplify right side
    685,180.90x = 358,532,558,091.22
  5. Step 5: Solve for x
    x = 358,532,558,091.22/685,180.90
  6. Step 6: Final answer
    x = 523,267.01

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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.