Home / 280,812.20-421,218.30-279,062.60

Finding the Fourth Proportional to 280,812.20, 421,218.30 and 279,062.60

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Solution

The fourth proportional to 280,812.20, 421,218.30 and 279,062.60 is: 418,593.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,812.20 : 421,218.30 = 279,062.60 : x
  2. Step 2: Convert to fraction form
    280,812.20/421,218.30 = 279,062.60/x
  3. Step 3: Cross multiply
    280,812.20x = 421,218.30 × 279,062.60
  4. Step 4: Simplify right side
    280,812.20x = 117,546,273,965.58
  5. Step 5: Solve for x
    x = 117,546,273,965.58/280,812.20
  6. Step 6: Final answer
    x = 418,593.90

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1.5x scale

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.