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Finding the Fourth Proportional to 640,544.40, 883,935.72 and 354,057.12

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Solution

The fourth proportional to 640,544.40, 883,935.72 and 354,057.12 is: 488,590.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,544.40 : 883,935.72 = 354,057.12 : x
  2. Step 2: Convert to fraction form
    640,544.40/883,935.72 = 354,057.12/x
  3. Step 3: Cross multiply
    640,544.40x = 883,935.72 × 354,057.12
  4. Step 4: Simplify right side
    640,544.40x = 312,963,735,288.33
  5. Step 5: Solve for x
    x = 312,963,735,288.33/640,544.40
  6. Step 6: Final answer
    x = 488,590.23

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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.