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Finding the Fourth Proportional to 305,186.94, 421,155.91 and 169,220.85

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Solution

The fourth proportional to 305,186.94, 421,155.91 and 169,220.85 is: 233,523.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,186.94 : 421,155.91 = 169,220.85 : x
  2. Step 2: Convert to fraction form
    305,186.94/421,155.91 = 169,220.85/x
  3. Step 3: Cross multiply
    305,186.94x = 421,155.91 × 169,220.85
  4. Step 4: Simplify right side
    305,186.94x = 71,268,358,753.05
  5. Step 5: Solve for x
    x = 71,268,358,753.05/305,186.94
  6. Step 6: Final answer
    x = 233,523.62

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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.