Home / 1,221,542.72-1,831,428.16-821,190.40

Finding the Fourth Proportional to 1,221,542.72, 1,831,428.16 and 821,190.40

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Solution

The fourth proportional to 1,221,542.72, 1,831,428.16 and 821,190.40 is: 1,231,190.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,221,542.72 : 1,831,428.16 = 821,190.40 : x
  2. Step 2: Convert to fraction form
    1,221,542.72/1,831,428.16 = 821,190.40/x
  3. Step 3: Cross multiply
    1,221,542.72x = 1,831,428.16 × 821,190.40
  4. Step 4: Simplify right side
    1,221,542.72x = 1,503,951,223,281.66
  5. Step 5: Solve for x
    x = 1,503,951,223,281.66/1,221,542.72
  6. Step 6: Final answer
    x = 1,231,190.03

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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.