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Finding the Fourth Proportional to 393,505.80, 589,967.10 and 168,682.20

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Solution

The fourth proportional to 393,505.80, 589,967.10 and 168,682.20 is: 252,898.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,505.80 : 589,967.10 = 168,682.20 : x
  2. Step 2: Convert to fraction form
    393,505.80/589,967.10 = 168,682.20/x
  3. Step 3: Cross multiply
    393,505.80x = 589,967.10 × 168,682.20
  4. Step 4: Simplify right side
    393,505.80x = 99,516,948,355.62
  5. Step 5: Solve for x
    x = 99,516,948,355.62/393,505.80
  6. Step 6: Final answer
    x = 252,898.30

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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.