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Finding the Fourth Proportional to 640,506.60, 883,967.64 and 368,586.36

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Solution

The fourth proportional to 640,506.60, 883,967.64 and 368,586.36 is: 508,688.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,506.60 : 883,967.64 = 368,586.36 : x
  2. Step 2: Convert to fraction form
    640,506.60/883,967.64 = 368,586.36/x
  3. Step 3: Cross multiply
    640,506.60x = 883,967.64 × 368,586.36
  4. Step 4: Simplify right side
    640,506.60x = 325,818,414,785.39
  5. Step 5: Solve for x
    x = 325,818,414,785.39/640,506.60
  6. Step 6: Final answer
    x = 508,688.61

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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.