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Finding the Fourth Proportional to 321,015.15, 481,719.56 and 143,672.13

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Solution

The fourth proportional to 321,015.15, 481,719.56 and 143,672.13 is: 215,596.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,015.15 : 481,719.56 = 143,672.13 : x
  2. Step 2: Convert to fraction form
    321,015.15/481,719.56 = 143,672.13/x
  3. Step 3: Cross multiply
    321,015.15x = 481,719.56 × 143,672.13
  4. Step 4: Simplify right side
    321,015.15x = 69,209,674,529.50
  5. Step 5: Solve for x
    x = 69,209,674,529.50/321,015.15
  6. Step 6: Final answer
    x = 215,596.29

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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.