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Finding the Fourth Proportional to 421,999.16, 635,960.92 and 379,921.28

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Solution

The fourth proportional to 421,999.16, 635,960.92 and 379,921.28 is: 572,548.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,999.16 : 635,960.92 = 379,921.28 : x
  2. Step 2: Convert to fraction form
    421,999.16/635,960.92 = 379,921.28/x
  3. Step 3: Cross multiply
    421,999.16x = 635,960.92 × 379,921.28
  4. Step 4: Simplify right side
    421,999.16x = 241,615,084,856.77
  5. Step 5: Solve for x
    x = 241,615,084,856.77/421,999.16
  6. Step 6: Final answer
    x = 572,548.73

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.