Home / 1,221,373.90-1,831,175.11-821,021.68

Finding the Fourth Proportional to 1,221,373.90, 1,831,175.11 and 821,021.68

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Solution

The fourth proportional to 1,221,373.90, 1,831,175.11 and 821,021.68 is: 1,230,937.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,221,373.90 : 1,831,175.11 = 821,021.68 : x
  2. Step 2: Convert to fraction form
    1,221,373.90/1,831,175.11 = 821,021.68/x
  3. Step 3: Cross multiply
    1,221,373.90x = 1,831,175.11 × 821,021.68
  4. Step 4: Simplify right side
    1,221,373.90x = 1,503,434,465,186.39
  5. Step 5: Solve for x
    x = 1,503,434,465,186.39/1,221,373.90
  6. Step 6: Final answer
    x = 1,230,937.12

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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.