Home / 712,214.21-982,858.47-389,954.28

Finding the Fourth Proportional to 712,214.21, 982,858.47 and 389,954.28

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Solution

The fourth proportional to 712,214.21, 982,858.47 and 389,954.28 is: 538,138.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,214.21 : 982,858.47 = 389,954.28 : x
  2. Step 2: Convert to fraction form
    712,214.21/982,858.47 = 389,954.28/x
  3. Step 3: Cross multiply
    712,214.21x = 982,858.47 × 389,954.28
  4. Step 4: Simplify right side
    712,214.21x = 383,269,867,010.75
  5. Step 5: Solve for x
    x = 383,269,867,010.75/712,214.21
  6. Step 6: Final answer
    x = 538,138.48

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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.