Home / 1,392,007.06-1,921,104.60-780,263.74

Finding the Fourth Proportional to 1,392,007.06, 1,921,104.60 and 780,263.74

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Solution

The fourth proportional to 1,392,007.06, 1,921,104.60 and 780,263.74 is: 1,076,839.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,392,007.06 : 1,921,104.60 = 780,263.74 : x
  2. Step 2: Convert to fraction form
    1,392,007.06/1,921,104.60 = 780,263.74/x
  3. Step 3: Cross multiply
    1,392,007.06x = 1,921,104.60 × 780,263.74
  4. Step 4: Simplify right side
    1,392,007.06x = 1,498,968,260,127.20
  5. Step 5: Solve for x
    x = 1,498,968,260,127.20/1,392,007.06
  6. Step 6: Final answer
    x = 1,076,839.55

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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.