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Finding the Fourth Proportional to 305,463.72, 421,620 and 171,370.92

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Solution

The fourth proportional to 305,463.72, 421,620 and 171,370.92 is: 236,536.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,463.72 : 421,620 = 171,370.92 : x
  2. Step 2: Convert to fraction form
    305,463.72/421,620 = 171,370.92/x
  3. Step 3: Cross multiply
    305,463.72x = 421,620 × 171,370.92
  4. Step 4: Simplify right side
    305,463.72x = 72,253,407,290.40
  5. Step 5: Solve for x
    x = 72,253,407,290.40/305,463.72
  6. Step 6: Final answer
    x = 236,536.79

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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.