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Finding the Fourth Proportional to 5,379,878.78, 8,069,854.44 and 1,966,761.24

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Solution

The fourth proportional to 5,379,878.78, 8,069,854.44 and 1,966,761.24 is: 2,950,155.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,379,878.78 : 8,069,854.44 = 1,966,761.24 : x
  2. Step 2: Convert to fraction form
    5,379,878.78/8,069,854.44 = 1,966,761.24/x
  3. Step 3: Cross multiply
    5,379,878.78x = 8,069,854.44 × 1,966,761.24
  4. Step 4: Simplify right side
    5,379,878.78x = 15,871,476,932,735.24
  5. Step 5: Solve for x
    x = 15,871,476,932,735.24/5,379,878.78
  6. Step 6: Final answer
    x = 2,950,155.12

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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.