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Finding the Fourth Proportional to 305,679.44, 421,842.60 and 169,722.16

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Solution

The fourth proportional to 305,679.44, 421,842.60 and 169,722.16 is: 234,219.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,679.44 : 421,842.60 = 169,722.16 : x
  2. Step 2: Convert to fraction form
    305,679.44/421,842.60 = 169,722.16/x
  3. Step 3: Cross multiply
    305,679.44x = 421,842.60 × 169,722.16
  4. Step 4: Simplify right side
    305,679.44x = 71,596,036,197.41
  5. Step 5: Solve for x
    x = 71,596,036,197.41/305,679.44
  6. Step 6: Final answer
    x = 234,219.34

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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.