Home / 819,209.40-1,228,986.90-258,300.60

Finding the Fourth Proportional to 819,209.40, 1,228,986.90 and 258,300.60

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Solution

The fourth proportional to 819,209.40, 1,228,986.90 and 258,300.60 is: 387,505.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    819,209.40 : 1,228,986.90 = 258,300.60 : x
  2. Step 2: Convert to fraction form
    819,209.40/1,228,986.90 = 258,300.60/x
  3. Step 3: Cross multiply
    819,209.40x = 1,228,986.90 × 258,300.60
  4. Step 4: Simplify right side
    819,209.40x = 317,448,053,662.14
  5. Step 5: Solve for x
    x = 317,448,053,662.14/819,209.40
  6. Step 6: Final answer
    x = 387,505.38

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1.5x scale

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.