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Finding the Fourth Proportional to 285,262.88, 393,668.78 and 156,206.79

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Solution

The fourth proportional to 285,262.88, 393,668.78 and 156,206.79 is: 215,568.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,262.88 : 393,668.78 = 156,206.79 : x
  2. Step 2: Convert to fraction form
    285,262.88/393,668.78 = 156,206.79/x
  3. Step 3: Cross multiply
    285,262.88x = 393,668.78 × 156,206.79
  4. Step 4: Simplify right side
    285,262.88x = 61,493,735,665.98
  5. Step 5: Solve for x
    x = 61,493,735,665.98/285,262.88
  6. Step 6: Final answer
    x = 215,568.66

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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.