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Finding the Fourth Proportional to 258,505.70, 356,731.58 and 143,783.96

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Solution

The fourth proportional to 258,505.70, 356,731.58 and 143,783.96 is: 198,418.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,505.70 : 356,731.58 = 143,783.96 : x
  2. Step 2: Convert to fraction form
    258,505.70/356,731.58 = 143,783.96/x
  3. Step 3: Cross multiply
    258,505.70x = 356,731.58 × 143,783.96
  4. Step 4: Simplify right side
    258,505.70x = 51,292,279,229.46
  5. Step 5: Solve for x
    x = 51,292,279,229.46/258,505.70
  6. Step 6: Final answer
    x = 198,418.37

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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.