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Finding the Fourth Proportional to 679,644, 936,917.28 and 475,057.80

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Solution

The fourth proportional to 679,644, 936,917.28 and 475,057.80 is: 654,886.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,644 : 936,917.28 = 475,057.80 : x
  2. Step 2: Convert to fraction form
    679,644/936,917.28 = 475,057.80/x
  3. Step 3: Cross multiply
    679,644x = 936,917.28 × 475,057.80
  4. Step 4: Simplify right side
    679,644x = 445,089,861,818.78
  5. Step 5: Solve for x
    x = 445,089,861,818.78/679,644
  6. Step 6: Final answer
    x = 654,886.77

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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.