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Finding the Fourth Proportional to 257,643.60, 386,278.55 and 173,194.28

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Solution

The fourth proportional to 257,643.60, 386,278.55 and 173,194.28 is: 259,665.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,643.60 : 386,278.55 = 173,194.28 : x
  2. Step 2: Convert to fraction form
    257,643.60/386,278.55 = 173,194.28/x
  3. Step 3: Cross multiply
    257,643.60x = 386,278.55 × 173,194.28
  4. Step 4: Simplify right side
    257,643.60x = 66,901,235,346.69
  5. Step 5: Solve for x
    x = 66,901,235,346.69/257,643.60
  6. Step 6: Final answer
    x = 259,665.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.