Home / 1,312,738.20-1,969,107.30-426,274.20

Finding the Fourth Proportional to 1,312,738.20, 1,969,107.30 and 426,274.20

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Solution

The fourth proportional to 1,312,738.20, 1,969,107.30 and 426,274.20 is: 639,411.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,312,738.20 : 1,969,107.30 = 426,274.20 : x
  2. Step 2: Convert to fraction form
    1,312,738.20/1,969,107.30 = 426,274.20/x
  3. Step 3: Cross multiply
    1,312,738.20x = 1,969,107.30 × 426,274.20
  4. Step 4: Simplify right side
    1,312,738.20x = 839,379,639,021.66
  5. Step 5: Solve for x
    x = 839,379,639,021.66/1,312,738.20
  6. Step 6: Final answer
    x = 639,411.30

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Double scale
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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.