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Finding the Fourth Proportional to 561,665.76, 775,062 and 319,912.80

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Solution

The fourth proportional to 561,665.76, 775,062 and 319,912.80 is: 441,458.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,665.76 : 775,062 = 319,912.80 : x
  2. Step 2: Convert to fraction form
    561,665.76/775,062 = 319,912.80/x
  3. Step 3: Cross multiply
    561,665.76x = 775,062 × 319,912.80
  4. Step 4: Simplify right side
    561,665.76x = 247,952,254,593.60
  5. Step 5: Solve for x
    x = 247,952,254,593.60/561,665.76
  6. Step 6: Final answer
    x = 441,458.73

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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.