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Finding the Fourth Proportional to 640,945.80, 961,418.70 and 401,797.35

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Solution

The fourth proportional to 640,945.80, 961,418.70 and 401,797.35 is: 602,696.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,945.80 : 961,418.70 = 401,797.35 : x
  2. Step 2: Convert to fraction form
    640,945.80/961,418.70 = 401,797.35/x
  3. Step 3: Cross multiply
    640,945.80x = 961,418.70 × 401,797.35
  4. Step 4: Simplify right side
    640,945.80x = 386,295,485,900.45
  5. Step 5: Solve for x
    x = 386,295,485,900.45/640,945.80
  6. Step 6: Final answer
    x = 602,696.03

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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.