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Finding the Fourth Proportional to 1,315,765.74, 1,815,563.48 and 734,917.31

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Solution

The fourth proportional to 1,315,765.74, 1,815,563.48 and 734,917.31 is: 1,014,077.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,315,765.74 : 1,815,563.48 = 734,917.31 : x
  2. Step 2: Convert to fraction form
    1,315,765.74/1,815,563.48 = 734,917.31/x
  3. Step 3: Cross multiply
    1,315,765.74x = 1,815,563.48 × 734,917.31
  4. Step 4: Simplify right side
    1,315,765.74x = 1,334,289,016,103.44
  5. Step 5: Solve for x
    x = 1,334,289,016,103.44/1,315,765.74
  6. Step 6: Final answer
    x = 1,014,077.94

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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.