Home / 1,221,374.40-1,831,175.87-821,022.18

Finding the Fourth Proportional to 1,221,374.40, 1,831,175.87 and 821,022.18

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Solution

The fourth proportional to 1,221,374.40, 1,831,175.87 and 821,022.18 is: 1,230,937.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,221,374.40 : 1,831,175.87 = 821,022.18 : x
  2. Step 2: Convert to fraction form
    1,221,374.40/1,831,175.87 = 821,022.18/x
  3. Step 3: Cross multiply
    1,221,374.40x = 1,831,175.87 × 821,022.18
  4. Step 4: Simplify right side
    1,221,374.40x = 1,503,436,000,645.69
  5. Step 5: Solve for x
    x = 1,503,436,000,645.69/1,221,374.40
  6. Step 6: Final answer
    x = 1,230,937.87

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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.