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Finding the Fourth Proportional to 620,969.69, 857,009.59 and 345,355.52

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Solution

The fourth proportional to 620,969.69, 857,009.59 and 345,355.52 is: 476,630.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,969.69 : 857,009.59 = 345,355.52 : x
  2. Step 2: Convert to fraction form
    620,969.69/857,009.59 = 345,355.52/x
  3. Step 3: Cross multiply
    620,969.69x = 857,009.59 × 345,355.52
  4. Step 4: Simplify right side
    620,969.69x = 295,972,987,451.00
  5. Step 5: Solve for x
    x = 295,972,987,451.00/620,969.69
  6. Step 6: Final answer
    x = 476,630.33

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.