Home / 1,285,856.80-1,928,539.51-645,982.89

Finding the Fourth Proportional to 1,285,856.80, 1,928,539.51 and 645,982.89

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Solution

The fourth proportional to 1,285,856.80, 1,928,539.51 and 645,982.89 is: 968,850.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,285,856.80 : 1,928,539.51 = 645,982.89 : x
  2. Step 2: Convert to fraction form
    1,285,856.80/1,928,539.51 = 645,982.89/x
  3. Step 3: Cross multiply
    1,285,856.80x = 1,928,539.51 × 645,982.89
  4. Step 4: Simplify right side
    1,285,856.80x = 1,245,803,521,363.45
  5. Step 5: Solve for x
    x = 1,245,803,521,363.45/1,285,856.80
  6. Step 6: Final answer
    x = 968,850.90

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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.