Home / 1,221,059.40-1,831,151.70-621,821.40

Finding the Fourth Proportional to 1,221,059.40, 1,831,151.70 and 621,821.40

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Solution

The fourth proportional to 1,221,059.40, 1,831,151.70 and 621,821.40 is: 932,509.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,221,059.40 : 1,831,151.70 = 621,821.40 : x
  2. Step 2: Convert to fraction form
    1,221,059.40/1,831,151.70 = 621,821.40/x
  3. Step 3: Cross multiply
    1,221,059.40x = 1,831,151.70 × 621,821.40
  4. Step 4: Simplify right side
    1,221,059.40x = 1,138,649,313,706.38
  5. Step 5: Solve for x
    x = 1,138,649,313,706.38/1,221,059.40
  6. Step 6: Final answer
    x = 932,509.36

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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.