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Finding the Fourth Proportional to 640,559.95, 883,945.85 and 379,084.76

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Solution

The fourth proportional to 640,559.95, 883,945.85 and 379,084.76 is: 523,121.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,559.95 : 883,945.85 = 379,084.76 : x
  2. Step 2: Convert to fraction form
    640,559.95/883,945.85 = 379,084.76/x
  3. Step 3: Cross multiply
    640,559.95x = 883,945.85 × 379,084.76
  4. Step 4: Simplify right side
    640,559.95x = 335,090,397,399.89
  5. Step 5: Solve for x
    x = 335,090,397,399.89/640,559.95
  6. Step 6: Final answer
    x = 523,121.06

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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.