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Finding the Fourth Proportional to 1,281,974.64, 1,769,669.73 and 798,778.53

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Solution

The fourth proportional to 1,281,974.64, 1,769,669.73 and 798,778.53 is: 1,102,653.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,281,974.64 : 1,769,669.73 = 798,778.53 : x
  2. Step 2: Convert to fraction form
    1,281,974.64/1,769,669.73 = 798,778.53/x
  3. Step 3: Cross multiply
    1,281,974.64x = 1,769,669.73 × 798,778.53
  4. Step 4: Simplify right side
    1,281,974.64x = 1,413,574,185,514.90
  5. Step 5: Solve for x
    x = 1,413,574,185,514.90/1,281,974.64
  6. Step 6: Final answer
    x = 1,102,653.78

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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.