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Finding the Fourth Proportional to 640,587.34, 883,975.83 and 354,088.97

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Solution

The fourth proportional to 640,587.34, 883,975.83 and 354,088.97 is: 488,623.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,587.34 : 883,975.83 = 354,088.97 : x
  2. Step 2: Convert to fraction form
    640,587.34/883,975.83 = 354,088.97/x
  3. Step 3: Cross multiply
    640,587.34x = 883,975.83 × 354,088.97
  4. Step 4: Simplify right side
    640,587.34x = 313,006,090,708.54
  5. Step 5: Solve for x
    x = 313,006,090,708.54/640,587.34
  6. Step 6: Final answer
    x = 488,623.60

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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.