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Finding the Fourth Proportional to 305,407.59, 421,448.25 and 169,440.09

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Solution

The fourth proportional to 305,407.59, 421,448.25 and 169,440.09 is: 233,819.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,407.59 : 421,448.25 = 169,440.09 : x
  2. Step 2: Convert to fraction form
    305,407.59/421,448.25 = 169,440.09/x
  3. Step 3: Cross multiply
    305,407.59x = 421,448.25 × 169,440.09
  4. Step 4: Simplify right side
    305,407.59x = 71,410,229,410.34
  5. Step 5: Solve for x
    x = 71,410,229,410.34/305,407.59
  6. Step 6: Final answer
    x = 233,819.43

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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.