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Finding the Fourth Proportional to 285,570.87, 394,087.86 and 156,514.47

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Solution

The fourth proportional to 285,570.87, 394,087.86 and 156,514.47 is: 215,990.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,570.87 : 394,087.86 = 156,514.47 : x
  2. Step 2: Convert to fraction form
    285,570.87/394,087.86 = 156,514.47/x
  3. Step 3: Cross multiply
    285,570.87x = 394,087.86 × 156,514.47
  4. Step 4: Simplify right side
    285,570.87x = 61,680,452,541.33
  5. Step 5: Solve for x
    x = 61,680,452,541.33/285,570.87
  6. Step 6: Final answer
    x = 215,990.00

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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.