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Finding the Fourth Proportional to 338,321.98, 507,491.21 and 113,685.67

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Solution

The fourth proportional to 338,321.98, 507,491.21 and 113,685.67 is: 170,531.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,321.98 : 507,491.21 = 113,685.67 : x
  2. Step 2: Convert to fraction form
    338,321.98/507,491.21 = 113,685.67/x
  3. Step 3: Cross multiply
    338,321.98x = 507,491.21 × 113,685.67
  4. Step 4: Simplify right side
    338,321.98x = 57,694,478,227.96
  5. Step 5: Solve for x
    x = 57,694,478,227.96/338,321.98
  6. Step 6: Final answer
    x = 170,531.27

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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.