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Finding the Fourth Proportional to 318,919.81, 478,367.73 and 79,034.40

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Solution

The fourth proportional to 318,919.81, 478,367.73 and 79,034.40 is: 118,548.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,919.81 : 478,367.73 = 79,034.40 : x
  2. Step 2: Convert to fraction form
    318,919.81/478,367.73 = 79,034.40/x
  3. Step 3: Cross multiply
    318,919.81x = 478,367.73 × 79,034.40
  4. Step 4: Simplify right side
    318,919.81x = 37,807,507,584.54
  5. Step 5: Solve for x
    x = 37,807,507,584.54/318,919.81
  6. Step 6: Final answer
    x = 118,548.63

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.