Home / 1,384,042.08-1,909,974.96-780,425.76

Finding the Fourth Proportional to 1,384,042.08, 1,909,974.96 and 780,425.76

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Solution

The fourth proportional to 1,384,042.08, 1,909,974.96 and 780,425.76 is: 1,076,985.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,384,042.08 : 1,909,974.96 = 780,425.76 : x
  2. Step 2: Convert to fraction form
    1,384,042.08/1,909,974.96 = 780,425.76/x
  3. Step 3: Cross multiply
    1,384,042.08x = 1,909,974.96 × 780,425.76
  4. Step 4: Simplify right side
    1,384,042.08x = 1,490,593,659,738.97
  5. Step 5: Solve for x
    x = 1,490,593,659,738.97/1,384,042.08
  6. Step 6: Final answer
    x = 1,076,985.79

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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.