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Finding the Fourth Proportional to 278,888.87, 384,855.81 and 151,561.73

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Solution

The fourth proportional to 278,888.87, 384,855.81 and 151,561.73 is: 209,149.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,888.87 : 384,855.81 = 151,561.73 : x
  2. Step 2: Convert to fraction form
    278,888.87/384,855.81 = 151,561.73/x
  3. Step 3: Cross multiply
    278,888.87x = 384,855.81 × 151,561.73
  4. Step 4: Simplify right side
    278,888.87x = 58,329,412,757.93
  5. Step 5: Solve for x
    x = 58,329,412,757.93/278,888.87
  6. Step 6: Final answer
    x = 209,149.30

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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.