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Finding the Fourth Proportional to 375,991.12, 518,864.21 and 203,912.88

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Solution

The fourth proportional to 375,991.12, 518,864.21 and 203,912.88 is: 281,397.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    375,991.12 : 518,864.21 = 203,912.88 : x
  2. Step 2: Convert to fraction form
    375,991.12/518,864.21 = 203,912.88/x
  3. Step 3: Cross multiply
    375,991.12x = 518,864.21 × 203,912.88
  4. Step 4: Simplify right side
    375,991.12x = 105,803,095,262.58
  5. Step 5: Solve for x
    x = 105,803,095,262.58/375,991.12
  6. Step 6: Final answer
    x = 281,397.86

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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.