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Finding the Fourth Proportional to 305,775.84, 421,974.80 and 169,818.56

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Solution

The fourth proportional to 305,775.84, 421,974.80 and 169,818.56 is: 234,351.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,775.84 : 421,974.80 = 169,818.56 : x
  2. Step 2: Convert to fraction form
    305,775.84/421,974.80 = 169,818.56/x
  3. Step 3: Cross multiply
    305,775.84x = 421,974.80 × 169,818.56
  4. Step 4: Simplify right side
    305,775.84x = 71,659,152,892.29
  5. Step 5: Solve for x
    x = 71,659,152,892.29/305,775.84
  6. Step 6: Final answer
    x = 234,351.91

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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.