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Finding the Fourth Proportional to 627,705.36, 866,215.20 and 355,798.32

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Solution

The fourth proportional to 627,705.36, 866,215.20 and 355,798.32 is: 490,991.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,705.36 : 866,215.20 = 355,798.32 : x
  2. Step 2: Convert to fraction form
    627,705.36/866,215.20 = 355,798.32/x
  3. Step 3: Cross multiply
    627,705.36x = 866,215.20 × 355,798.32
  4. Step 4: Simplify right side
    627,705.36x = 308,197,912,918.46
  5. Step 5: Solve for x
    x = 308,197,912,918.46/627,705.36
  6. Step 6: Final answer
    x = 490,991.37

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Double scale
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1.5x scale

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.