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Finding the Fourth Proportional to 421,226.99, 632,400.99 and 221,687.51

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Solution

The fourth proportional to 421,226.99, 632,400.99 and 221,687.51 is: 332,826.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,226.99 : 632,400.99 = 221,687.51 : x
  2. Step 2: Convert to fraction form
    421,226.99/632,400.99 = 221,687.51/x
  3. Step 3: Cross multiply
    421,226.99x = 632,400.99 × 221,687.51
  4. Step 4: Simplify right side
    421,226.99x = 140,195,397,632.63
  5. Step 5: Solve for x
    x = 140,195,397,632.63/421,226.99
  6. Step 6: Final answer
    x = 332,826.25

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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.