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Finding the Fourth Proportional to 1,225,886, 1,691,018.23 and 766,202.80

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Solution

The fourth proportional to 1,225,886, 1,691,018.23 and 766,202.80 is: 1,056,919.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,225,886 : 1,691,018.23 = 766,202.80 : x
  2. Step 2: Convert to fraction form
    1,225,886/1,691,018.23 = 766,202.80/x
  3. Step 3: Cross multiply
    1,225,886x = 1,691,018.23 × 766,202.80
  4. Step 4: Simplify right side
    1,225,886x = 1,295,662,898,846.03
  5. Step 5: Solve for x
    x = 1,295,662,898,846.03/1,225,886
  6. Step 6: Final answer
    x = 1,056,919.57

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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.