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Finding the Fourth Proportional to 545,343.30, 818,211.78 and 190,409.61

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Solution

The fourth proportional to 545,343.30, 818,211.78 and 190,409.61 is: 285,683.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,343.30 : 818,211.78 = 190,409.61 : x
  2. Step 2: Convert to fraction form
    545,343.30/818,211.78 = 190,409.61/x
  3. Step 3: Cross multiply
    545,343.30x = 818,211.78 × 190,409.61
  4. Step 4: Simplify right side
    545,343.30x = 155,795,385,927.21
  5. Step 5: Solve for x
    x = 155,795,385,927.21/545,343.30
  6. Step 6: Final answer
    x = 285,683.14

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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.