Home / 1,285,708.80-1,928,217.60-387,148.80

Finding the Fourth Proportional to 1,285,708.80, 1,928,217.60 and 387,148.80

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Solution

The fourth proportional to 1,285,708.80, 1,928,217.60 and 387,148.80 is: 580,619.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,285,708.80 : 1,928,217.60 = 387,148.80 : x
  2. Step 2: Convert to fraction form
    1,285,708.80/1,928,217.60 = 387,148.80/x
  3. Step 3: Cross multiply
    1,285,708.80x = 1,928,217.60 × 387,148.80
  4. Step 4: Simplify right side
    1,285,708.80x = 746,507,129,978.88
  5. Step 5: Solve for x
    x = 746,507,129,978.88/1,285,708.80
  6. Step 6: Final answer
    x = 580,619.13

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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.