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Finding the Fourth Proportional to 679,647, 936,921.42 and 475,060.80

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Solution

The fourth proportional to 679,647, 936,921.42 and 475,060.80 is: 654,890.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,647 : 936,921.42 = 475,060.80 : x
  2. Step 2: Convert to fraction form
    679,647/936,921.42 = 475,060.80/x
  3. Step 3: Cross multiply
    679,647x = 936,921.42 × 475,060.80
  4. Step 4: Simplify right side
    679,647x = 445,094,639,322.34
  5. Step 5: Solve for x
    x = 445,094,639,322.34/679,647
  6. Step 6: Final answer
    x = 654,890.91

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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.