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Finding the Fourth Proportional to 305,178.76, 421,151.74 and 169,218.44

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Solution

The fourth proportional to 305,178.76, 421,151.74 and 169,218.44 is: 233,524.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,178.76 : 421,151.74 = 169,218.44 : x
  2. Step 2: Convert to fraction form
    305,178.76/421,151.74 = 169,218.44/x
  3. Step 3: Cross multiply
    305,178.76x = 421,151.74 × 169,218.44
  4. Step 4: Simplify right side
    305,178.76x = 71,266,640,446.09
  5. Step 5: Solve for x
    x = 71,266,640,446.09/305,178.76
  6. Step 6: Final answer
    x = 233,524.25

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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.