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Finding the Fourth Proportional to 305,597.43, 421,703.34 and 169,620.69

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Solution

The fourth proportional to 305,597.43, 421,703.34 and 169,620.69 is: 234,064.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,597.43 : 421,703.34 = 169,620.69 : x
  2. Step 2: Convert to fraction form
    305,597.43/421,703.34 = 169,620.69/x
  3. Step 3: Cross multiply
    305,597.43x = 421,703.34 × 169,620.69
  4. Step 4: Simplify right side
    305,597.43x = 71,529,611,506.10
  5. Step 5: Solve for x
    x = 71,529,611,506.10/305,597.43
  6. Step 6: Final answer
    x = 234,064.83

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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.