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Finding the Fourth Proportional to 338,631.40, 507,930.90 and 113,969.80

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Solution

The fourth proportional to 338,631.40, 507,930.90 and 113,969.80 is: 170,949.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,631.40 : 507,930.90 = 113,969.80 : x
  2. Step 2: Convert to fraction form
    338,631.40/507,930.90 = 113,969.80/x
  3. Step 3: Cross multiply
    338,631.40x = 507,930.90 × 113,969.80
  4. Step 4: Simplify right side
    338,631.40x = 57,888,783,086.82
  5. Step 5: Solve for x
    x = 57,888,783,086.82/338,631.40
  6. Step 6: Final answer
    x = 170,949.25

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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.