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Finding the Fourth Proportional to 640,026.40, 883,219.32 and 353,540.32

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Solution

The fourth proportional to 640,026.40, 883,219.32 and 353,540.32 is: 487,876.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,026.40 : 883,219.32 = 353,540.32 : x
  2. Step 2: Convert to fraction form
    640,026.40/883,219.32 = 353,540.32/x
  3. Step 3: Cross multiply
    640,026.40x = 883,219.32 × 353,540.32
  4. Step 4: Simplify right side
    640,026.40x = 312,253,641,022.98
  5. Step 5: Solve for x
    x = 312,253,641,022.98/640,026.40
  6. Step 6: Final answer
    x = 487,876.19

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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.