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Finding the Fourth Proportional to 627,688.18, 866,191.45 and 355,781.10

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Solution

The fourth proportional to 627,688.18, 866,191.45 and 355,781.10 is: 490,967.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,688.18 : 866,191.45 = 355,781.10 : x
  2. Step 2: Convert to fraction form
    627,688.18/866,191.45 = 355,781.10/x
  3. Step 3: Cross multiply
    627,688.18x = 866,191.45 × 355,781.10
  4. Step 4: Simplify right side
    627,688.18x = 308,174,546,891.60
  5. Step 5: Solve for x
    x = 308,174,546,891.60/627,688.18
  6. Step 6: Final answer
    x = 490,967.58

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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.