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Finding the Fourth Proportional to 317,641.88, 438,550.94 and 196,912.20

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Solution

The fourth proportional to 317,641.88, 438,550.94 and 196,912.20 is: 271,866.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,641.88 : 438,550.94 = 196,912.20 : x
  2. Step 2: Convert to fraction form
    317,641.88/438,550.94 = 196,912.20/x
  3. Step 3: Cross multiply
    317,641.88x = 438,550.94 × 196,912.20
  4. Step 4: Simplify right side
    317,641.88x = 86,356,030,407.47
  5. Step 5: Solve for x
    x = 86,356,030,407.47/317,641.88
  6. Step 6: Final answer
    x = 271,866.01

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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.