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Finding the Fourth Proportional to 256,883.22, 385,383.42 and 138,551.94

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Solution

The fourth proportional to 256,883.22, 385,383.42 and 138,551.94 is: 207,859.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,883.22 : 385,383.42 = 138,551.94 : x
  2. Step 2: Convert to fraction form
    256,883.22/385,383.42 = 138,551.94/x
  3. Step 3: Cross multiply
    256,883.22x = 385,383.42 × 138,551.94
  4. Step 4: Simplify right side
    256,883.22x = 53,395,620,484.83
  5. Step 5: Solve for x
    x = 53,395,620,484.83/256,883.22
  6. Step 6: Final answer
    x = 207,859.51

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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.