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Finding the Fourth Proportional to 305,540.39, 421,530 and 225,159.64

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Solution

The fourth proportional to 305,540.39, 421,530 and 225,159.64 is: 310,635.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,540.39 : 421,530 = 225,159.64 : x
  2. Step 2: Convert to fraction form
    305,540.39/421,530 = 225,159.64/x
  3. Step 3: Cross multiply
    305,540.39x = 421,530 × 225,159.64
  4. Step 4: Simplify right side
    305,540.39x = 94,911,543,049.20
  5. Step 5: Solve for x
    x = 94,911,543,049.20/305,540.39
  6. Step 6: Final answer
    x = 310,635.01

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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.