Home / 1,221,372.90-1,831,173.62-821,020.68

Finding the Fourth Proportional to 1,221,372.90, 1,831,173.62 and 821,020.68

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Solution

The fourth proportional to 1,221,372.90, 1,831,173.62 and 821,020.68 is: 1,230,935.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,221,372.90 : 1,831,173.62 = 821,020.68 : x
  2. Step 2: Convert to fraction form
    1,221,372.90/1,831,173.62 = 821,020.68/x
  3. Step 3: Cross multiply
    1,221,372.90x = 1,831,173.62 × 821,020.68
  4. Step 4: Simplify right side
    1,221,372.90x = 1,503,431,406,585.36
  5. Step 5: Solve for x
    x = 1,503,431,406,585.36/1,221,372.90
  6. Step 6: Final answer
    x = 1,230,935.62

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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.