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Finding the Fourth Proportional to 305,190.45, 421,167.87 and 169,230.13

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Solution

The fourth proportional to 305,190.45, 421,167.87 and 169,230.13 is: 233,540.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,190.45 : 421,167.87 = 169,230.13 : x
  2. Step 2: Convert to fraction form
    305,190.45/421,167.87 = 169,230.13/x
  3. Step 3: Cross multiply
    305,190.45x = 421,167.87 × 169,230.13
  4. Step 4: Simplify right side
    305,190.45x = 71,274,292,339.00
  5. Step 5: Solve for x
    x = 71,274,292,339.00/305,190.45
  6. Step 6: Final answer
    x = 233,540.38

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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.