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Finding the Fourth Proportional to 263,139.40, 394,449.90 and 130,040.20

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Solution

The fourth proportional to 263,139.40, 394,449.90 and 130,040.20 is: 194,932.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,139.40 : 394,449.90 = 130,040.20 : x
  2. Step 2: Convert to fraction form
    263,139.40/394,449.90 = 130,040.20/x
  3. Step 3: Cross multiply
    263,139.40x = 394,449.90 × 130,040.20
  4. Step 4: Simplify right side
    263,139.40x = 51,294,343,885.98
  5. Step 5: Solve for x
    x = 51,294,343,885.98/263,139.40
  6. Step 6: Final answer
    x = 194,932.21

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1.5x scale

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.