Home / 305,738.07-421,904.45-169,780.70

Finding the Fourth Proportional to 305,738.07, 421,904.45 and 169,780.70

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Solution

The fourth proportional to 305,738.07, 421,904.45 and 169,780.70 is: 234,289.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,738.07 : 421,904.45 = 169,780.70 : x
  2. Step 2: Convert to fraction form
    305,738.07/421,904.45 = 169,780.70/x
  3. Step 3: Cross multiply
    305,738.07x = 421,904.45 × 169,780.70
  4. Step 4: Simplify right side
    305,738.07x = 71,631,229,895.69
  5. Step 5: Solve for x
    x = 71,631,229,895.69/305,738.07
  6. Step 6: Final answer
    x = 234,289.53

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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.