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Finding the Fourth Proportional to 392,040.87, 587,991.03 and 103,854.43

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Solution

The fourth proportional to 392,040.87, 587,991.03 and 103,854.43 is: 155,763.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,040.87 : 587,991.03 = 103,854.43 : x
  2. Step 2: Convert to fraction form
    392,040.87/587,991.03 = 103,854.43/x
  3. Step 3: Cross multiply
    392,040.87x = 587,991.03 × 103,854.43
  4. Step 4: Simplify right side
    392,040.87x = 61,065,473,265.76
  5. Step 5: Solve for x
    x = 61,065,473,265.76/392,040.87
  6. Step 6: Final answer
    x = 155,763.03

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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.