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Finding the Fourth Proportional to 613,712.75, 920,601.93 and 193,021.43

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Solution

The fourth proportional to 613,712.75, 920,601.93 and 193,021.43 is: 289,542.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,712.75 : 920,601.93 = 193,021.43 : x
  2. Step 2: Convert to fraction form
    613,712.75/920,601.93 = 193,021.43/x
  3. Step 3: Cross multiply
    613,712.75x = 920,601.93 × 193,021.43
  4. Step 4: Simplify right side
    613,712.75x = 177,695,900,989.36
  5. Step 5: Solve for x
    x = 177,695,900,989.36/613,712.75
  6. Step 6: Final answer
    x = 289,542.46

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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.