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Finding the Fourth Proportional to 336,578.68, 505,016.25 and 261,586.45

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Solution

The fourth proportional to 336,578.68, 505,016.25 and 261,586.45 is: 392,494.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    336,578.68 : 505,016.25 = 261,586.45 : x
  2. Step 2: Convert to fraction form
    336,578.68/505,016.25 = 261,586.45/x
  3. Step 3: Cross multiply
    336,578.68x = 505,016.25 × 261,586.45
  4. Step 4: Simplify right side
    336,578.68x = 132,105,408,029.81
  5. Step 5: Solve for x
    x = 132,105,408,029.81/336,578.68
  6. Step 6: Final answer
    x = 392,494.88

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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.