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Finding the Fourth Proportional to 305,354.70, 421,392.03 and 169,397.55

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Solution

The fourth proportional to 305,354.70, 421,392.03 and 169,397.55 is: 233,770.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,354.70 : 421,392.03 = 169,397.55 : x
  2. Step 2: Convert to fraction form
    305,354.70/421,392.03 = 169,397.55/x
  3. Step 3: Cross multiply
    305,354.70x = 421,392.03 × 169,397.55
  4. Step 4: Simplify right side
    305,354.70x = 71,382,777,471.53
  5. Step 5: Solve for x
    x = 71,382,777,471.53/305,354.70
  6. Step 6: Final answer
    x = 233,770.03

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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.