Home / 419,428.20-629,229.66-138,967.40

Finding the Fourth Proportional to 419,428.20, 629,229.66 and 138,967.40

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Solution

The fourth proportional to 419,428.20, 629,229.66 and 138,967.40 is: 208,480.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,428.20 : 629,229.66 = 138,967.40 : x
  2. Step 2: Convert to fraction form
    419,428.20/629,229.66 = 138,967.40/x
  3. Step 3: Cross multiply
    419,428.20x = 629,229.66 × 138,967.40
  4. Step 4: Simplify right side
    419,428.20x = 87,442,409,853.08
  5. Step 5: Solve for x
    x = 87,442,409,853.08/419,428.20
  6. Step 6: Final answer
    x = 208,480.04

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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.