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Finding the Fourth Proportional to 685,885.73, 946,476.50 and 379,941.44

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Solution

The fourth proportional to 685,885.73, 946,476.50 and 379,941.44 is: 524,293.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,885.73 : 946,476.50 = 379,941.44 : x
  2. Step 2: Convert to fraction form
    685,885.73/946,476.50 = 379,941.44/x
  3. Step 3: Cross multiply
    685,885.73x = 946,476.50 × 379,941.44
  4. Step 4: Simplify right side
    685,885.73x = 359,605,637,704.07
  5. Step 5: Solve for x
    x = 359,605,637,704.07/685,885.73
  6. Step 6: Final answer
    x = 524,293.81

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Double scale
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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.