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Finding the Fourth Proportional to 705,873, 1,058,341.42 and 256,540.49

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Solution

The fourth proportional to 705,873, 1,058,341.42 and 256,540.49 is: 384,640.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    705,873 : 1,058,341.42 = 256,540.49 : x
  2. Step 2: Convert to fraction form
    705,873/1,058,341.42 = 256,540.49/x
  3. Step 3: Cross multiply
    705,873x = 1,058,341.42 × 256,540.49
  4. Step 4: Simplify right side
    705,873x = 271,507,419,899.69
  5. Step 5: Solve for x
    x = 271,507,419,899.69/705,873
  6. Step 6: Final answer
    x = 384,640.61

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.