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Finding the Fourth Proportional to 305,116.80, 421,219.62 and 236,981.22

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Solution

The fourth proportional to 305,116.80, 421,219.62 and 236,981.22 is: 327,157.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,116.80 : 421,219.62 = 236,981.22 : x
  2. Step 2: Convert to fraction form
    305,116.80/421,219.62 = 236,981.22/x
  3. Step 3: Cross multiply
    305,116.80x = 421,219.62 × 236,981.22
  4. Step 4: Simplify right side
    305,116.80x = 99,821,139,435.54
  5. Step 5: Solve for x
    x = 99,821,139,435.54/305,116.80
  6. Step 6: Final answer
    x = 327,157.14

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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.