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Finding the Fourth Proportional to 305,375.16, 421,418.79 and 169,411.80

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Solution

The fourth proportional to 305,375.16, 421,418.79 and 169,411.80 is: 233,788.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,375.16 : 421,418.79 = 169,411.80 : x
  2. Step 2: Convert to fraction form
    305,375.16/421,418.79 = 169,411.80/x
  3. Step 3: Cross multiply
    305,375.16x = 421,418.79 × 169,411.80
  4. Step 4: Simplify right side
    305,375.16x = 71,393,315,767.72
  5. Step 5: Solve for x
    x = 71,393,315,767.72/305,375.16
  6. Step 6: Final answer
    x = 233,788.88

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1.5x scale

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.