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Finding the Fourth Proportional to 681,022.58, 939,361.16 and 425,930.90

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Solution

The fourth proportional to 681,022.58, 939,361.16 and 425,930.90 is: 587,503.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,022.58 : 939,361.16 = 425,930.90 : x
  2. Step 2: Convert to fraction form
    681,022.58/939,361.16 = 425,930.90/x
  3. Step 3: Cross multiply
    681,022.58x = 939,361.16 × 425,930.90
  4. Step 4: Simplify right side
    681,022.58x = 400,102,944,303.84
  5. Step 5: Solve for x
    x = 400,102,944,303.84/681,022.58
  6. Step 6: Final answer
    x = 587,503.20

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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.