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Finding the Fourth Proportional to 221,632.80, 331,981.20 and 146,788.80

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Solution

The fourth proportional to 221,632.80, 331,981.20 and 146,788.80 is: 219,873.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,632.80 : 331,981.20 = 146,788.80 : x
  2. Step 2: Convert to fraction form
    221,632.80/331,981.20 = 146,788.80/x
  3. Step 3: Cross multiply
    221,632.80x = 331,981.20 × 146,788.80
  4. Step 4: Simplify right side
    221,632.80x = 48,731,121,970.56
  5. Step 5: Solve for x
    x = 48,731,121,970.56/221,632.80
  6. Step 6: Final answer
    x = 219,873.24

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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.