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Finding the Fourth Proportional to 343,393.20, 515,089.80 and 156,769.20

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Solution

The fourth proportional to 343,393.20, 515,089.80 and 156,769.20 is: 235,153.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,393.20 : 515,089.80 = 156,769.20 : x
  2. Step 2: Convert to fraction form
    343,393.20/515,089.80 = 156,769.20/x
  3. Step 3: Cross multiply
    343,393.20x = 515,089.80 × 156,769.20
  4. Step 4: Simplify right side
    343,393.20x = 80,750,215,874.16
  5. Step 5: Solve for x
    x = 80,750,215,874.16/343,393.20
  6. Step 6: Final answer
    x = 235,153.80

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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.