Home / 2,078,757.12-3,118,142.90-639,430.77

Finding the Fourth Proportional to 2,078,757.12, 3,118,142.90 and 639,430.77

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Solution

The fourth proportional to 2,078,757.12, 3,118,142.90 and 639,430.77 is: 959,148.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,078,757.12 : 3,118,142.90 = 639,430.77 : x
  2. Step 2: Convert to fraction form
    2,078,757.12/3,118,142.90 = 639,430.77/x
  3. Step 3: Cross multiply
    2,078,757.12x = 3,118,142.90 × 639,430.77
  4. Step 4: Simplify right side
    2,078,757.12x = 1,993,836,517,115.61
  5. Step 5: Solve for x
    x = 1,993,836,517,115.61/2,078,757.12
  6. Step 6: Final answer
    x = 959,148.38

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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.