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Finding the Fourth Proportional to 305,455.80, 458,183.70 and 285,772.80

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Solution

The fourth proportional to 305,455.80, 458,183.70 and 285,772.80 is: 428,659.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,455.80 : 458,183.70 = 285,772.80 : x
  2. Step 2: Convert to fraction form
    305,455.80/458,183.70 = 285,772.80/x
  3. Step 3: Cross multiply
    305,455.80x = 458,183.70 × 285,772.80
  4. Step 4: Simplify right side
    305,455.80x = 130,936,438,863.36
  5. Step 5: Solve for x
    x = 130,936,438,863.36/305,455.80
  6. Step 6: Final answer
    x = 428,659.20

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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.