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Finding the Fourth Proportional to 347,549.78, 479,659.10 and 211,663.37

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Solution

The fourth proportional to 347,549.78, 479,659.10 and 211,663.37 is: 292,120.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,549.78 : 479,659.10 = 211,663.37 : x
  2. Step 2: Convert to fraction form
    347,549.78/479,659.10 = 211,663.37/x
  3. Step 3: Cross multiply
    347,549.78x = 479,659.10 × 211,663.37
  4. Step 4: Simplify right side
    347,549.78x = 101,526,258,100.56
  5. Step 5: Solve for x
    x = 101,526,258,100.56/347,549.78
  6. Step 6: Final answer
    x = 292,120.05

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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.