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Finding the Fourth Proportional to 262,885.20, 393,809.40 and 157,390.80

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Solution

The fourth proportional to 262,885.20, 393,809.40 and 157,390.80 is: 235,775.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,885.20 : 393,809.40 = 157,390.80 : x
  2. Step 2: Convert to fraction form
    262,885.20/393,809.40 = 157,390.80/x
  3. Step 3: Cross multiply
    262,885.20x = 393,809.40 × 157,390.80
  4. Step 4: Simplify right side
    262,885.20x = 61,981,976,513.52
  5. Step 5: Solve for x
    x = 61,981,976,513.52/262,885.20
  6. Step 6: Final answer
    x = 235,775.83

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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.