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Finding the Fourth Proportional to 619,639.59, 855,100.32 and 347,706.87

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Solution

The fourth proportional to 619,639.59, 855,100.32 and 347,706.87 is: 479,834.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,639.59 : 855,100.32 = 347,706.87 : x
  2. Step 2: Convert to fraction form
    619,639.59/855,100.32 = 347,706.87/x
  3. Step 3: Cross multiply
    619,639.59x = 855,100.32 × 347,706.87
  4. Step 4: Simplify right side
    619,639.59x = 297,324,255,803.20
  5. Step 5: Solve for x
    x = 297,324,255,803.20/619,639.59
  6. Step 6: Final answer
    x = 479,834.18

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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.