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Finding the Fourth Proportional to 305,212.17, 421,190.67 and 169,246.20

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Solution

The fourth proportional to 305,212.17, 421,190.67 and 169,246.20 is: 233,558.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,212.17 : 421,190.67 = 169,246.20 : x
  2. Step 2: Convert to fraction form
    305,212.17/421,190.67 = 169,246.20/x
  3. Step 3: Cross multiply
    305,212.17x = 421,190.67 × 169,246.20
  4. Step 4: Simplify right side
    305,212.17x = 71,284,920,372.95
  5. Step 5: Solve for x
    x = 71,284,920,372.95/305,212.17
  6. Step 6: Final answer
    x = 233,558.58

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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.