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Finding the Fourth Proportional to 389,912.96, 583,538.67 and 326,804.37

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Solution

The fourth proportional to 389,912.96, 583,538.67 and 326,804.37 is: 489,091.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,912.96 : 583,538.67 = 326,804.37 : x
  2. Step 2: Convert to fraction form
    389,912.96/583,538.67 = 326,804.37/x
  3. Step 3: Cross multiply
    389,912.96x = 583,538.67 × 326,804.37
  4. Step 4: Simplify right side
    389,912.96x = 190,702,987,419.99
  5. Step 5: Solve for x
    x = 190,702,987,419.99/389,912.96
  6. Step 6: Final answer
    x = 489,091.18

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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.