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Finding the Fourth Proportional to 1,964,603.64, 2,947,395.91 and 685,229.50

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Solution

The fourth proportional to 1,964,603.64, 2,947,395.91 and 685,229.50 is: 1,028,015.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,964,603.64 : 2,947,395.91 = 685,229.50 : x
  2. Step 2: Convert to fraction form
    1,964,603.64/2,947,395.91 = 685,229.50/x
  3. Step 3: Cross multiply
    1,964,603.64x = 2,947,395.91 × 685,229.50
  4. Step 4: Simplify right side
    1,964,603.64x = 2,019,642,616,629.78
  5. Step 5: Solve for x
    x = 2,019,642,616,629.78/1,964,603.64
  6. Step 6: Final answer
    x = 1,028,015.31

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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.