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Finding the Fourth Proportional to 278,461.35, 384,589.89 and 188,190.09

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Solution

The fourth proportional to 278,461.35, 384,589.89 and 188,190.09 is: 259,914.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,461.35 : 384,589.89 = 188,190.09 : x
  2. Step 2: Convert to fraction form
    278,461.35/384,589.89 = 188,190.09/x
  3. Step 3: Cross multiply
    278,461.35x = 384,589.89 × 188,190.09
  4. Step 4: Simplify right side
    278,461.35x = 72,376,006,012.19
  5. Step 5: Solve for x
    x = 72,376,006,012.19/278,461.35
  6. Step 6: Final answer
    x = 259,914.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.