Home / 1,276,889.80-1,762,195.40-780,387.12

Finding the Fourth Proportional to 1,276,889.80, 1,762,195.40 and 780,387.12

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Solution

The fourth proportional to 1,276,889.80, 1,762,195.40 and 780,387.12 is: 1,076,987.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,276,889.80 : 1,762,195.40 = 780,387.12 : x
  2. Step 2: Convert to fraction form
    1,276,889.80/1,762,195.40 = 780,387.12/x
  3. Step 3: Cross multiply
    1,276,889.80x = 1,762,195.40 × 780,387.12
  4. Step 4: Simplify right side
    1,276,889.80x = 1,375,194,593,083.25
  5. Step 5: Solve for x
    x = 1,375,194,593,083.25/1,276,889.80
  6. Step 6: Final answer
    x = 1,076,987.69

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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.