Home / 1,221,375.90-1,831,178.10-821,023.68

Finding the Fourth Proportional to 1,221,375.90, 1,831,178.10 and 821,023.68

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Solution

The fourth proportional to 1,221,375.90, 1,831,178.10 and 821,023.68 is: 1,230,940.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,221,375.90 : 1,831,178.10 = 821,023.68 : x
  2. Step 2: Convert to fraction form
    1,221,375.90/1,831,178.10 = 821,023.68/x
  3. Step 3: Cross multiply
    1,221,375.90x = 1,831,178.10 × 821,023.68
  4. Step 4: Simplify right side
    1,221,375.90x = 1,503,440,582,397.41
  5. Step 5: Solve for x
    x = 1,503,440,582,397.41/1,221,375.90
  6. Step 6: Final answer
    x = 1,230,940.11

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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.