Home / 1,311,879.78-1,809,775.51-767,681.79

Finding the Fourth Proportional to 1,311,879.78, 1,809,775.51 and 767,681.79

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Solution

The fourth proportional to 1,311,879.78, 1,809,775.51 and 767,681.79 is: 1,059,038.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,311,879.78 : 1,809,775.51 = 767,681.79 : x
  2. Step 2: Convert to fraction form
    1,311,879.78/1,809,775.51 = 767,681.79/x
  3. Step 3: Cross multiply
    1,311,879.78x = 1,809,775.51 × 767,681.79
  4. Step 4: Simplify right side
    1,311,879.78x = 1,389,331,694,309.10
  5. Step 5: Solve for x
    x = 1,389,331,694,309.10/1,311,879.78
  6. Step 6: Final answer
    x = 1,059,038.88

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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.