Home / 1,188,009.80-1,782,014.70-978,057.80

Finding the Fourth Proportional to 1,188,009.80, 1,782,014.70 and 978,057.80

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Solution

The fourth proportional to 1,188,009.80, 1,782,014.70 and 978,057.80 is: 1,467,086.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,188,009.80 : 1,782,014.70 = 978,057.80 : x
  2. Step 2: Convert to fraction form
    1,188,009.80/1,782,014.70 = 978,057.80/x
  3. Step 3: Cross multiply
    1,188,009.80x = 1,782,014.70 × 978,057.80
  4. Step 4: Simplify right side
    1,188,009.80x = 1,742,913,377,049.66
  5. Step 5: Solve for x
    x = 1,742,913,377,049.66/1,188,009.80
  6. Step 6: Final answer
    x = 1,467,086.70

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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.