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Finding the Fourth Proportional to 393,560.70, 590,341.05 and 156,939.90

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Solution

The fourth proportional to 393,560.70, 590,341.05 and 156,939.90 is: 235,409.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,560.70 : 590,341.05 = 156,939.90 : x
  2. Step 2: Convert to fraction form
    393,560.70/590,341.05 = 156,939.90/x
  3. Step 3: Cross multiply
    393,560.70x = 590,341.05 × 156,939.90
  4. Step 4: Simplify right side
    393,560.70x = 92,648,065,352.90
  5. Step 5: Solve for x
    x = 92,648,065,352.90/393,560.70
  6. Step 6: Final answer
    x = 235,409.85

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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.