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Finding the Fourth Proportional to 640,505.60, 883,966.26 and 368,585.36

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Solution

The fourth proportional to 640,505.60, 883,966.26 and 368,585.36 is: 508,687.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,505.60 : 883,966.26 = 368,585.36 : x
  2. Step 2: Convert to fraction form
    640,505.60/883,966.26 = 368,585.36/x
  3. Step 3: Cross multiply
    640,505.60x = 883,966.26 × 368,585.36
  4. Step 4: Simplify right side
    640,505.60x = 325,817,022,169.95
  5. Step 5: Solve for x
    x = 325,817,022,169.95/640,505.60
  6. Step 6: Final answer
    x = 508,687.23

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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.