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Finding the Fourth Proportional to 258,401.79, 356,614.43 and 155,039.85

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Solution

The fourth proportional to 258,401.79, 356,614.43 and 155,039.85 is: 213,966.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,401.79 : 356,614.43 = 155,039.85 : x
  2. Step 2: Convert to fraction form
    258,401.79/356,614.43 = 155,039.85/x
  3. Step 3: Cross multiply
    258,401.79x = 356,614.43 × 155,039.85
  4. Step 4: Simplify right side
    258,401.79x = 55,289,446,959.84
  5. Step 5: Solve for x
    x = 55,289,446,959.84/258,401.79
  6. Step 6: Final answer
    x = 213,966.97

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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.