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Finding the Fourth Proportional to 1,279,707, 1,765,995.66 and 743,197.56

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Solution

The fourth proportional to 1,279,707, 1,765,995.66 and 743,197.56 is: 1,025,612.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,279,707 : 1,765,995.66 = 743,197.56 : x
  2. Step 2: Convert to fraction form
    1,279,707/1,765,995.66 = 743,197.56/x
  3. Step 3: Cross multiply
    1,279,707x = 1,765,995.66 × 743,197.56
  4. Step 4: Simplify right side
    1,279,707x = 1,312,483,665,482.59
  5. Step 5: Solve for x
    x = 1,312,483,665,482.59/1,279,707
  6. Step 6: Final answer
    x = 1,025,612.63

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.