Home / 1,288,212.80-1,932,319.20-813,358.40

Finding the Fourth Proportional to 1,288,212.80, 1,932,319.20 and 813,358.40

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Solution

The fourth proportional to 1,288,212.80, 1,932,319.20 and 813,358.40 is: 1,220,037.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,288,212.80 : 1,932,319.20 = 813,358.40 : x
  2. Step 2: Convert to fraction form
    1,288,212.80/1,932,319.20 = 813,358.40/x
  3. Step 3: Cross multiply
    1,288,212.80x = 1,932,319.20 × 813,358.40
  4. Step 4: Simplify right side
    1,288,212.80x = 1,571,668,052,801.28
  5. Step 5: Solve for x
    x = 1,571,668,052,801.28/1,288,212.80
  6. Step 6: Final answer
    x = 1,220,037.60

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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.