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Finding the Fourth Proportional to 640,258.70, 883,556.71 and 353,776.28

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Solution

The fourth proportional to 640,258.70, 883,556.71 and 353,776.28 is: 488,211.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,258.70 : 883,556.71 = 353,776.28 : x
  2. Step 2: Convert to fraction form
    640,258.70/883,556.71 = 353,776.28/x
  3. Step 3: Cross multiply
    640,258.70x = 883,556.71 × 353,776.28
  4. Step 4: Simplify right side
    640,258.70x = 312,581,400,730.62
  5. Step 5: Solve for x
    x = 312,581,400,730.62/640,258.70
  6. Step 6: Final answer
    x = 488,211.10

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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.