Home / 305,211.15-421,212.51-169,257.69

Finding the Fourth Proportional to 305,211.15, 421,212.51 and 169,257.69

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Solution

The fourth proportional to 305,211.15, 421,212.51 and 169,257.69 is: 233,587.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,211.15 : 421,212.51 = 169,257.69 : x
  2. Step 2: Convert to fraction form
    305,211.15/421,212.51 = 169,257.69/x
  3. Step 3: Cross multiply
    305,211.15x = 421,212.51 × 169,257.69
  4. Step 4: Simplify right side
    305,211.15x = 71,293,456,441.70
  5. Step 5: Solve for x
    x = 71,293,456,441.70/305,211.15
  6. Step 6: Final answer
    x = 233,587.33

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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.