Home / 1,320,418.95-1,980,628.43-721,053.17

Finding the Fourth Proportional to 1,320,418.95, 1,980,628.43 and 721,053.17

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Solution

The fourth proportional to 1,320,418.95, 1,980,628.43 and 721,053.17 is: 1,081,579.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,320,418.95 : 1,980,628.43 = 721,053.17 : x
  2. Step 2: Convert to fraction form
    1,320,418.95/1,980,628.43 = 721,053.17/x
  3. Step 3: Cross multiply
    1,320,418.95x = 1,980,628.43 × 721,053.17
  4. Step 4: Simplify right side
    1,320,418.95x = 1,428,138,409,389.93
  5. Step 5: Solve for x
    x = 1,428,138,409,389.93/1,320,418.95
  6. Step 6: Final answer
    x = 1,081,579.76

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.