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Finding the Fourth Proportional to 262,887.20, 394,330.80 and 221,415.20

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Solution

The fourth proportional to 262,887.20, 394,330.80 and 221,415.20 is: 332,122.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,887.20 : 394,330.80 = 221,415.20 : x
  2. Step 2: Convert to fraction form
    262,887.20/394,330.80 = 221,415.20/x
  3. Step 3: Cross multiply
    262,887.20x = 394,330.80 × 221,415.20
  4. Step 4: Simplify right side
    262,887.20x = 87,310,832,948.16
  5. Step 5: Solve for x
    x = 87,310,832,948.16/262,887.20
  6. Step 6: Final answer
    x = 332,122.80

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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.