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Finding the Fourth Proportional to 640,586.88, 883,975.38 and 354,089.88

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Solution

The fourth proportional to 640,586.88, 883,975.38 and 354,089.88 is: 488,624.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,586.88 : 883,975.38 = 354,089.88 : x
  2. Step 2: Convert to fraction form
    640,586.88/883,975.38 = 354,089.88/x
  3. Step 3: Cross multiply
    640,586.88x = 883,975.38 × 354,089.88
  4. Step 4: Simplify right side
    640,586.88x = 313,006,734,899.32
  5. Step 5: Solve for x
    x = 313,006,734,899.32/640,586.88
  6. Step 6: Final answer
    x = 488,624.95

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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.