Home / 1,392,321.48-1,921,358.34-819,393

Finding the Fourth Proportional to 1,392,321.48, 1,921,358.34 and 819,393

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Solution

The fourth proportional to 1,392,321.48, 1,921,358.34 and 819,393 is: 1,130,735.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,392,321.48 : 1,921,358.34 = 819,393 : x
  2. Step 2: Convert to fraction form
    1,392,321.48/1,921,358.34 = 819,393/x
  3. Step 3: Cross multiply
    1,392,321.48x = 1,921,358.34 × 819,393
  4. Step 4: Simplify right side
    1,392,321.48x = 1,574,347,574,287.62
  5. Step 5: Solve for x
    x = 1,574,347,574,287.62/1,392,321.48
  6. Step 6: Final answer
    x = 1,130,735.68

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.