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Finding the Fourth Proportional to 679,902.44, 938,245.78 and 373,978.81

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Solution

The fourth proportional to 679,902.44, 938,245.78 and 373,978.81 is: 516,079.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,902.44 : 938,245.78 = 373,978.81 : x
  2. Step 2: Convert to fraction form
    679,902.44/938,245.78 = 373,978.81/x
  3. Step 3: Cross multiply
    679,902.44x = 938,245.78 × 373,978.81
  4. Step 4: Simplify right side
    679,902.44x = 350,884,040,291.92
  5. Step 5: Solve for x
    x = 350,884,040,291.92/679,902.44
  6. Step 6: Final answer
    x = 516,079.98

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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.