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Finding the Fourth Proportional to 640,523.25, 883,939.95 and 354,061.76

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Solution

The fourth proportional to 640,523.25, 883,939.95 and 354,061.76 is: 488,615.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,523.25 : 883,939.95 = 354,061.76 : x
  2. Step 2: Convert to fraction form
    640,523.25/883,939.95 = 354,061.76/x
  3. Step 3: Cross multiply
    640,523.25x = 883,939.95 × 354,061.76
  4. Step 4: Simplify right side
    640,523.25x = 312,969,334,431.31
  5. Step 5: Solve for x
    x = 312,969,334,431.31/640,523.25
  6. Step 6: Final answer
    x = 488,615.10

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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.