Home / 1,391,981.56-1,921,069.38-780,238.24

Finding the Fourth Proportional to 1,391,981.56, 1,921,069.38 and 780,238.24

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Solution

The fourth proportional to 1,391,981.56, 1,921,069.38 and 780,238.24 is: 1,076,804.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,391,981.56 : 1,921,069.38 = 780,238.24 : x
  2. Step 2: Convert to fraction form
    1,391,981.56/1,921,069.38 = 780,238.24/x
  3. Step 3: Cross multiply
    1,391,981.56x = 1,921,069.38 × 780,238.24
  4. Step 4: Simplify right side
    1,391,981.56x = 1,498,891,791,969.09
  5. Step 5: Solve for x
    x = 1,498,891,791,969.09/1,391,981.56
  6. Step 6: Final answer
    x = 1,076,804.35

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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.