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Finding the Fourth Proportional to 1,078,310.40, 1,619,215.20 and 605,918.40

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Solution

The fourth proportional to 1,078,310.40, 1,619,215.20 and 605,918.40 is: 909,860.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,078,310.40 : 1,619,215.20 = 605,918.40 : x
  2. Step 2: Convert to fraction form
    1,078,310.40/1,619,215.20 = 605,918.40/x
  3. Step 3: Cross multiply
    1,078,310.40x = 1,619,215.20 × 605,918.40
  4. Step 4: Simplify right side
    1,078,310.40x = 981,112,283,239.68
  5. Step 5: Solve for x
    x = 981,112,283,239.68/1,078,310.40
  6. Step 6: Final answer
    x = 909,860.73

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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.