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Finding the Fourth Proportional to 640,110.53, 883,345.88 and 353,611.91

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Solution

The fourth proportional to 640,110.53, 883,345.88 and 353,611.91 is: 487,980.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,110.53 : 883,345.88 = 353,611.91 : x
  2. Step 2: Convert to fraction form
    640,110.53/883,345.88 = 353,611.91/x
  3. Step 3: Cross multiply
    640,110.53x = 883,345.88 × 353,611.91
  4. Step 4: Simplify right side
    640,110.53x = 312,361,620,284.73
  5. Step 5: Solve for x
    x = 312,361,620,284.73/640,110.53
  6. Step 6: Final answer
    x = 487,980.76

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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.