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Finding the Fourth Proportional to 3,147,986.78, 4,721,451.96 and 873,742.24

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Solution

The fourth proportional to 3,147,986.78, 4,721,451.96 and 873,742.24 is: 1,310,466.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,147,986.78 : 4,721,451.96 = 873,742.24 : x
  2. Step 2: Convert to fraction form
    3,147,986.78/4,721,451.96 = 873,742.24/x
  3. Step 3: Cross multiply
    3,147,986.78x = 4,721,451.96 × 873,742.24
  4. Step 4: Simplify right side
    3,147,986.78x = 4,125,332,020,761.14
  5. Step 5: Solve for x
    x = 4,125,332,020,761.14/3,147,986.78
  6. Step 6: Final answer
    x = 1,310,466.76

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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.