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Finding the Fourth Proportional to 613,221.75, 845,522.01 and 419,722.65

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Solution

The fourth proportional to 613,221.75, 845,522.01 and 419,722.65 is: 578,721.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,221.75 : 845,522.01 = 419,722.65 : x
  2. Step 2: Convert to fraction form
    613,221.75/845,522.01 = 419,722.65/x
  3. Step 3: Cross multiply
    613,221.75x = 845,522.01 × 419,722.65
  4. Step 4: Simplify right side
    613,221.75x = 354,884,738,670.53
  5. Step 5: Solve for x
    x = 354,884,738,670.53/613,221.75
  6. Step 6: Final answer
    x = 578,721.71

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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.