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Finding the Fourth Proportional to 641,159.50, 884,723.56 and 354,640.64

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Solution

The fourth proportional to 641,159.50, 884,723.56 and 354,640.64 is: 489,361.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,159.50 : 884,723.56 = 354,640.64 : x
  2. Step 2: Convert to fraction form
    641,159.50/884,723.56 = 354,640.64/x
  3. Step 3: Cross multiply
    641,159.50x = 884,723.56 × 354,640.64
  4. Step 4: Simplify right side
    641,159.50x = 313,758,929,541.48
  5. Step 5: Solve for x
    x = 313,758,929,541.48/641,159.50
  6. Step 6: Final answer
    x = 489,361.74

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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.