Home / 1,278,109.80-1,914,831.90-778,890.60

Finding the Fourth Proportional to 1,278,109.80, 1,914,831.90 and 778,890.60

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Solution

The fourth proportional to 1,278,109.80, 1,914,831.90 and 778,890.60 is: 1,166,914.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278,109.80 : 1,914,831.90 = 778,890.60 : x
  2. Step 2: Convert to fraction form
    1,278,109.80/1,914,831.90 = 778,890.60/x
  3. Step 3: Cross multiply
    1,278,109.80x = 1,914,831.90 × 778,890.60
  4. Step 4: Simplify right side
    1,278,109.80x = 1,491,444,567,490.14
  5. Step 5: Solve for x
    x = 1,491,444,567,490.14/1,278,109.80
  6. Step 6: Final answer
    x = 1,166,914.27

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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.