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Finding the Fourth Proportional to 610,861.68, 916,072.92 and 211,393.98

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Solution

The fourth proportional to 610,861.68, 916,072.92 and 211,393.98 is: 317,014.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    610,861.68 : 916,072.92 = 211,393.98 : x
  2. Step 2: Convert to fraction form
    610,861.68/916,072.92 = 211,393.98/x
  3. Step 3: Cross multiply
    610,861.68x = 916,072.92 × 211,393.98
  4. Step 4: Simplify right side
    610,861.68x = 193,652,300,529.02
  5. Step 5: Solve for x
    x = 193,652,300,529.02/610,861.68
  6. Step 6: Final answer
    x = 317,014.98

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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.