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Finding the Fourth Proportional to 38,290.67, 57,428.42 and 36,391.90

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Solution

The fourth proportional to 38,290.67, 57,428.42 and 36,391.90 is: 54,580.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,290.67 : 57,428.42 = 36,391.90 : x
  2. Step 2: Convert to fraction form
    38,290.67/57,428.42 = 36,391.90/x
  3. Step 3: Cross multiply
    38,290.67x = 57,428.42 × 36,391.90
  4. Step 4: Simplify right side
    38,290.67x = 2,089,929,317.80
  5. Step 5: Solve for x
    x = 2,089,929,317.80/38,290.67
  6. Step 6: Final answer
    x = 54,580.64

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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.