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Finding the Fourth Proportional to 640,411.48, 883,195.71 and 531,343.12

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Solution

The fourth proportional to 640,411.48, 883,195.71 and 531,343.12 is: 732,778.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,411.48 : 883,195.71 = 531,343.12 : x
  2. Step 2: Convert to fraction form
    640,411.48/883,195.71 = 531,343.12/x
  3. Step 3: Cross multiply
    640,411.48x = 883,195.71 × 531,343.12
  4. Step 4: Simplify right side
    640,411.48x = 469,279,964,122.02
  5. Step 5: Solve for x
    x = 469,279,964,122.02/640,411.48
  6. Step 6: Final answer
    x = 732,778.81

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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.