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Finding the Fourth Proportional to 512,189.40, 768,399.30 and 157,219.80

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Solution

The fourth proportional to 512,189.40, 768,399.30 and 157,219.80 is: 235,865.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,189.40 : 768,399.30 = 157,219.80 : x
  2. Step 2: Convert to fraction form
    512,189.40/768,399.30 = 157,219.80/x
  3. Step 3: Cross multiply
    512,189.40x = 768,399.30 × 157,219.80
  4. Step 4: Simplify right side
    512,189.40x = 120,807,584,266.14
  5. Step 5: Solve for x
    x = 120,807,584,266.14/512,189.40
  6. Step 6: Final answer
    x = 235,865.06

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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.