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Finding the Fourth Proportional to 305,343.45, 421,376.49 and 169,386.32

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Solution

The fourth proportional to 305,343.45, 421,376.49 and 169,386.32 is: 233,754.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,343.45 : 421,376.49 = 169,386.32 : x
  2. Step 2: Convert to fraction form
    305,343.45/421,376.49 = 169,386.32/x
  3. Step 3: Cross multiply
    305,343.45x = 421,376.49 × 169,386.32
  4. Step 4: Simplify right side
    305,343.45x = 71,375,414,029.06
  5. Step 5: Solve for x
    x = 71,375,414,029.06/305,343.45
  6. Step 6: Final answer
    x = 233,754.53

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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.