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Finding the Fourth Proportional to 1,311,256, 1,967,222 and 712,063.36

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Solution

The fourth proportional to 1,311,256, 1,967,222 and 712,063.36 is: 1,068,278.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,311,256 : 1,967,222 = 712,063.36 : x
  2. Step 2: Convert to fraction form
    1,311,256/1,967,222 = 712,063.36/x
  3. Step 3: Cross multiply
    1,311,256x = 1,967,222 × 712,063.36
  4. Step 4: Simplify right side
    1,311,256x = 1,400,786,707,185.92
  5. Step 5: Solve for x
    x = 1,400,786,707,185.92/1,311,256
  6. Step 6: Final answer
    x = 1,068,278.59

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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.