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Finding the Fourth Proportional to 305,613.77, 421,745.13 and 169,667.42

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Solution

The fourth proportional to 305,613.77, 421,745.13 and 169,667.42 is: 234,140.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,613.77 : 421,745.13 = 169,667.42 : x
  2. Step 2: Convert to fraction form
    305,613.77/421,745.13 = 169,667.42/x
  3. Step 3: Cross multiply
    305,613.77x = 421,745.13 × 169,667.42
  4. Step 4: Simplify right side
    305,613.77x = 71,556,405,995.94
  5. Step 5: Solve for x
    x = 71,556,405,995.94/305,613.77
  6. Step 6: Final answer
    x = 234,140.00

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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.