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Finding the Fourth Proportional to 627,643.20, 866,345.76 and 401,289.60

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Solution

The fourth proportional to 627,643.20, 866,345.76 and 401,289.60 is: 553,906.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,643.20 : 866,345.76 = 401,289.60 : x
  2. Step 2: Convert to fraction form
    627,643.20/866,345.76 = 401,289.60/x
  3. Step 3: Cross multiply
    627,643.20x = 866,345.76 × 401,289.60
  4. Step 4: Simplify right side
    627,643.20x = 347,655,543,492.10
  5. Step 5: Solve for x
    x = 347,655,543,492.10/627,643.20
  6. Step 6: Final answer
    x = 553,906.33

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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.