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Finding the Fourth Proportional to 685,199.79, 945,551.43 and 379,276.74

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Solution

The fourth proportional to 685,199.79, 945,551.43 and 379,276.74 is: 523,388.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,199.79 : 945,551.43 = 379,276.74 : x
  2. Step 2: Convert to fraction form
    685,199.79/945,551.43 = 379,276.74/x
  3. Step 3: Cross multiply
    685,199.79x = 945,551.43 × 379,276.74
  4. Step 4: Simplify right side
    685,199.79x = 358,625,663,872.74
  5. Step 5: Solve for x
    x = 358,625,663,872.74/685,199.79
  6. Step 6: Final answer
    x = 523,388.46

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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.