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Finding the Fourth Proportional to 305,349.45, 421,384.77 and 169,392.30

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Solution

The fourth proportional to 305,349.45, 421,384.77 and 169,392.30 is: 233,762.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,349.45 : 421,384.77 = 169,392.30 : x
  2. Step 2: Convert to fraction form
    305,349.45/421,384.77 = 169,392.30/x
  3. Step 3: Cross multiply
    305,349.45x = 421,384.77 × 169,392.30
  4. Step 4: Simplify right side
    305,349.45x = 71,379,335,375.27
  5. Step 5: Solve for x
    x = 71,379,335,375.27/305,349.45
  6. Step 6: Final answer
    x = 233,762.78

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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.