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Finding the Fourth Proportional to 644,546.60, 965,667.90 and 311,388.20

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Solution

The fourth proportional to 644,546.60, 965,667.90 and 311,388.20 is: 466,525.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,546.60 : 965,667.90 = 311,388.20 : x
  2. Step 2: Convert to fraction form
    644,546.60/965,667.90 = 311,388.20/x
  3. Step 3: Cross multiply
    644,546.60x = 965,667.90 × 311,388.20
  4. Step 4: Simplify right side
    644,546.60x = 300,697,589,178.78
  5. Step 5: Solve for x
    x = 300,697,589,178.78/644,546.60
  6. Step 6: Final answer
    x = 466,525.75

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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.