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Finding the Fourth Proportional to 393,167.20, 589,621.20 and 143,816.80

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Solution

The fourth proportional to 393,167.20, 589,621.20 and 143,816.80 is: 215,677.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,167.20 : 589,621.20 = 143,816.80 : x
  2. Step 2: Convert to fraction form
    393,167.20/589,621.20 = 143,816.80/x
  3. Step 3: Cross multiply
    393,167.20x = 589,621.20 × 143,816.80
  4. Step 4: Simplify right side
    393,167.20x = 84,797,434,196.16
  5. Step 5: Solve for x
    x = 84,797,434,196.16/393,167.20
  6. Step 6: Final answer
    x = 215,677.79

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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.