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Finding the Fourth Proportional to 640,700.56, 884,185.23 and 354,239.14

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Solution

The fourth proportional to 640,700.56, 884,185.23 and 354,239.14 is: 488,860.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,700.56 : 884,185.23 = 354,239.14 : x
  2. Step 2: Convert to fraction form
    640,700.56/884,185.23 = 354,239.14/x
  3. Step 3: Cross multiply
    640,700.56x = 884,185.23 × 354,239.14
  4. Step 4: Simplify right side
    640,700.56x = 313,213,015,475.90
  5. Step 5: Solve for x
    x = 313,213,015,475.90/640,700.56
  6. Step 6: Final answer
    x = 488,860.22

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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.