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Finding the Fourth Proportional to 305,318.45, 421,340.99 and 169,342.94

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Solution

The fourth proportional to 305,318.45, 421,340.99 and 169,342.94 is: 233,694.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,318.45 : 421,340.99 = 169,342.94 : x
  2. Step 2: Convert to fraction form
    305,318.45/421,340.99 = 169,342.94/x
  3. Step 3: Cross multiply
    305,318.45x = 421,340.99 × 169,342.94
  4. Step 4: Simplify right side
    305,318.45x = 71,351,119,035.69
  5. Step 5: Solve for x
    x = 71,351,119,035.69/305,318.45
  6. Step 6: Final answer
    x = 233,694.10

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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.