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Finding the Fourth Proportional to 591,219.89, 815,883.41 and 319,287.80

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Solution

The fourth proportional to 591,219.89, 815,883.41 and 319,287.80 is: 440,617.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    591,219.89 : 815,883.41 = 319,287.80 : x
  2. Step 2: Convert to fraction form
    591,219.89/815,883.41 = 319,287.80/x
  3. Step 3: Cross multiply
    591,219.89x = 815,883.41 × 319,287.80
  4. Step 4: Simplify right side
    591,219.89x = 260,501,621,873.33
  5. Step 5: Solve for x
    x = 260,501,621,873.33/591,219.89
  6. Step 6: Final answer
    x = 440,617.15

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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.