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Finding the Fourth Proportional to 305,777.50, 421,958.63 and 169,820.21

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Solution

The fourth proportional to 305,777.50, 421,958.63 and 169,820.21 is: 234,343.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,777.50 : 421,958.63 = 169,820.21 : x
  2. Step 2: Convert to fraction form
    305,777.50/421,958.63 = 169,820.21/x
  3. Step 3: Cross multiply
    305,777.50x = 421,958.63 × 169,820.21
  4. Step 4: Simplify right side
    305,777.50x = 71,657,104,637.36
  5. Step 5: Solve for x
    x = 71,657,104,637.36/305,777.50
  6. Step 6: Final answer
    x = 234,343.94

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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.