Home / 1,383,738.08-1,909,555.40-780,121.76

Finding the Fourth Proportional to 1,383,738.08, 1,909,555.40 and 780,121.76

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Solution

The fourth proportional to 1,383,738.08, 1,909,555.40 and 780,121.76 is: 1,076,566.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,383,738.08 : 1,909,555.40 = 780,121.76 : x
  2. Step 2: Convert to fraction form
    1,383,738.08/1,909,555.40 = 780,121.76/x
  3. Step 3: Cross multiply
    1,383,738.08x = 1,909,555.40 × 780,121.76
  4. Step 4: Simplify right side
    1,383,738.08x = 1,489,685,719,465.50
  5. Step 5: Solve for x
    x = 1,489,685,719,465.50/1,383,738.08
  6. Step 6: Final answer
    x = 1,076,566.25

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.