Home / 278,982.20-384,990.90-151,661

Finding the Fourth Proportional to 278,982.20, 384,990.90 and 151,661

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Solution

The fourth proportional to 278,982.20, 384,990.90 and 151,661 is: 209,289.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,982.20 : 384,990.90 = 151,661 : x
  2. Step 2: Convert to fraction form
    278,982.20/384,990.90 = 151,661/x
  3. Step 3: Cross multiply
    278,982.20x = 384,990.90 × 151,661
  4. Step 4: Simplify right side
    278,982.20x = 58,388,104,884.90
  5. Step 5: Solve for x
    x = 58,388,104,884.90/278,982.20
  6. Step 6: Final answer
    x = 209,289.71

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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.