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Finding the Fourth Proportional to 394,218.80, 591,328.20 and 370,890.80

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Solution

The fourth proportional to 394,218.80, 591,328.20 and 370,890.80 is: 556,336.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,218.80 : 591,328.20 = 370,890.80 : x
  2. Step 2: Convert to fraction form
    394,218.80/591,328.20 = 370,890.80/x
  3. Step 3: Cross multiply
    394,218.80x = 591,328.20 × 370,890.80
  4. Step 4: Simplify right side
    394,218.80x = 219,318,189,160.56
  5. Step 5: Solve for x
    x = 219,318,189,160.56/394,218.80
  6. Step 6: Final answer
    x = 556,336.20

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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.