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Finding the Fourth Proportional to 279,993.60, 419,990.40 and 253,749.60

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Solution

The fourth proportional to 279,993.60, 419,990.40 and 253,749.60 is: 380,624.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,993.60 : 419,990.40 = 253,749.60 : x
  2. Step 2: Convert to fraction form
    279,993.60/419,990.40 = 253,749.60/x
  3. Step 3: Cross multiply
    279,993.60x = 419,990.40 × 253,749.60
  4. Step 4: Simplify right side
    279,993.60x = 106,572,396,003.84
  5. Step 5: Solve for x
    x = 106,572,396,003.84/279,993.60
  6. Step 6: Final answer
    x = 380,624.40

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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.