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Finding the Fourth Proportional to 305,399.70, 421,454.13 and 169,442.58

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Solution

The fourth proportional to 305,399.70, 421,454.13 and 169,442.58 is: 233,832.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,399.70 : 421,454.13 = 169,442.58 : x
  2. Step 2: Convert to fraction form
    305,399.70/421,454.13 = 169,442.58/x
  3. Step 3: Cross multiply
    305,399.70x = 421,454.13 × 169,442.58
  4. Step 4: Simplify right side
    305,399.70x = 71,412,275,138.86
  5. Step 5: Solve for x
    x = 71,412,275,138.86/305,399.70
  6. Step 6: Final answer
    x = 233,832.17

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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.