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Finding the Fourth Proportional to 393,496.40, 590,487.60 and 156,814.40

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Solution

The fourth proportional to 393,496.40, 590,487.60 and 156,814.40 is: 235,318.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,496.40 : 590,487.60 = 156,814.40 : x
  2. Step 2: Convert to fraction form
    393,496.40/590,487.60 = 156,814.40/x
  3. Step 3: Cross multiply
    393,496.40x = 590,487.60 × 156,814.40
  4. Step 4: Simplify right side
    393,496.40x = 92,596,958,701.44
  5. Step 5: Solve for x
    x = 92,596,958,701.44/393,496.40
  6. Step 6: Final answer
    x = 235,318.44

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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.