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Finding the Fourth Proportional to 490,220.90, 676,399.90 and 286,179.22

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Solution

The fourth proportional to 490,220.90, 676,399.90 and 286,179.22 is: 394,866.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,220.90 : 676,399.90 = 286,179.22 : x
  2. Step 2: Convert to fraction form
    490,220.90/676,399.90 = 286,179.22/x
  3. Step 3: Cross multiply
    490,220.90x = 676,399.90 × 286,179.22
  4. Step 4: Simplify right side
    490,220.90x = 193,571,595,790.08
  5. Step 5: Solve for x
    x = 193,571,595,790.08/490,220.90
  6. Step 6: Final answer
    x = 394,866.06

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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.