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Finding the Fourth Proportional to 658,628.22, 987,720.93 and 259,164.30

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Solution

The fourth proportional to 658,628.22, 987,720.93 and 259,164.30 is: 388,659.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,628.22 : 987,720.93 = 259,164.30 : x
  2. Step 2: Convert to fraction form
    658,628.22/987,720.93 = 259,164.30/x
  3. Step 3: Cross multiply
    658,628.22x = 987,720.93 × 259,164.30
  4. Step 4: Simplify right side
    658,628.22x = 255,982,003,418.80
  5. Step 5: Solve for x
    x = 255,982,003,418.80/658,628.22
  6. Step 6: Final answer
    x = 388,659.33

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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.