Home / 820,143.70-1,230,215.55-459,944.80

Finding the Fourth Proportional to 820,143.70, 1,230,215.55 and 459,944.80

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Solution

The fourth proportional to 820,143.70, 1,230,215.55 and 459,944.80 is: 689,917.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,143.70 : 1,230,215.55 = 459,944.80 : x
  2. Step 2: Convert to fraction form
    820,143.70/1,230,215.55 = 459,944.80/x
  3. Step 3: Cross multiply
    820,143.70x = 1,230,215.55 × 459,944.80
  4. Step 4: Simplify right side
    820,143.70x = 565,831,245,101.64
  5. Step 5: Solve for x
    x = 565,831,245,101.64/820,143.70
  6. Step 6: Final answer
    x = 689,917.20

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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.