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Finding the Fourth Proportional to 438,958.40, 658,437.60 and 389,969.60

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Solution

The fourth proportional to 438,958.40, 658,437.60 and 389,969.60 is: 584,954.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,958.40 : 658,437.60 = 389,969.60 : x
  2. Step 2: Convert to fraction form
    438,958.40/658,437.60 = 389,969.60/x
  3. Step 3: Cross multiply
    438,958.40x = 658,437.60 × 389,969.60
  4. Step 4: Simplify right side
    438,958.40x = 256,770,647,496.96
  5. Step 5: Solve for x
    x = 256,770,647,496.96/438,958.40
  6. Step 6: Final answer
    x = 584,954.40

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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.