Home / 1,221,381.40-1,831,186.36-821,029.18

Finding the Fourth Proportional to 1,221,381.40, 1,831,186.36 and 821,029.18

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Solution

The fourth proportional to 1,221,381.40, 1,831,186.36 and 821,029.18 is: 1,230,948.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,221,381.40 : 1,831,186.36 = 821,029.18 : x
  2. Step 2: Convert to fraction form
    1,221,381.40/1,831,186.36 = 821,029.18/x
  3. Step 3: Cross multiply
    1,221,381.40x = 1,831,186.36 × 821,029.18
  4. Step 4: Simplify right side
    1,221,381.40x = 1,503,457,435,577.99
  5. Step 5: Solve for x
    x = 1,503,457,435,577.99/1,221,381.40
  6. Step 6: Final answer
    x = 1,230,948.36

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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.