Home / 1,261,358.40-1,891,969.78-621,023.79

Finding the Fourth Proportional to 1,261,358.40, 1,891,969.78 and 621,023.79

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Solution

The fourth proportional to 1,261,358.40, 1,891,969.78 and 621,023.79 is: 931,502.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,261,358.40 : 1,891,969.78 = 621,023.79 : x
  2. Step 2: Convert to fraction form
    1,261,358.40/1,891,969.78 = 621,023.79/x
  3. Step 3: Cross multiply
    1,261,358.40x = 1,891,969.78 × 621,023.79
  4. Step 4: Simplify right side
    1,261,358.40x = 1,174,958,240,235.95
  5. Step 5: Solve for x
    x = 1,174,958,240,235.95/1,261,358.40
  6. Step 6: Final answer
    x = 931,502.29

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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.