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Finding the Fourth Proportional to 305,101.84, 421,039.38 and 170,965.84

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Solution

The fourth proportional to 305,101.84, 421,039.38 and 170,965.84 is: 235,932.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,101.84 : 421,039.38 = 170,965.84 : x
  2. Step 2: Convert to fraction form
    305,101.84/421,039.38 = 170,965.84/x
  3. Step 3: Cross multiply
    305,101.84x = 421,039.38 × 170,965.84
  4. Step 4: Simplify right side
    305,101.84x = 71,983,351,274.78
  5. Step 5: Solve for x
    x = 71,983,351,274.78/305,101.84
  6. Step 6: Final answer
    x = 235,932.21

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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.