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Finding the Fourth Proportional to 1,317,619.05, 1,976,428.58 and 654,067.05

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Solution

The fourth proportional to 1,317,619.05, 1,976,428.58 and 654,067.05 is: 981,100.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,317,619.05 : 1,976,428.58 = 654,067.05 : x
  2. Step 2: Convert to fraction form
    1,317,619.05/1,976,428.58 = 654,067.05/x
  3. Step 3: Cross multiply
    1,317,619.05x = 1,976,428.58 × 654,067.05
  4. Step 4: Simplify right side
    1,317,619.05x = 1,292,716,807,585.95
  5. Step 5: Solve for x
    x = 1,292,716,807,585.95/1,317,619.05
  6. Step 6: Final answer
    x = 981,100.58

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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.