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Finding the Fourth Proportional to 257,445.80, 386,168.70 and 222,016.40

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Solution

The fourth proportional to 257,445.80, 386,168.70 and 222,016.40 is: 333,024.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,445.80 : 386,168.70 = 222,016.40 : x
  2. Step 2: Convert to fraction form
    257,445.80/386,168.70 = 222,016.40/x
  3. Step 3: Cross multiply
    257,445.80x = 386,168.70 × 222,016.40
  4. Step 4: Simplify right side
    257,445.80x = 85,735,784,566.68
  5. Step 5: Solve for x
    x = 85,735,784,566.68/257,445.80
  6. Step 6: Final answer
    x = 333,024.60

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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.