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Finding the Fourth Proportional to 393,491.80, 589,946.10 and 168,668.20

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Solution

The fourth proportional to 393,491.80, 589,946.10 and 168,668.20 is: 252,877.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,491.80 : 589,946.10 = 168,668.20 : x
  2. Step 2: Convert to fraction form
    393,491.80/589,946.10 = 168,668.20/x
  3. Step 3: Cross multiply
    393,491.80x = 589,946.10 × 168,668.20
  4. Step 4: Simplify right side
    393,491.80x = 99,505,146,784.02
  5. Step 5: Solve for x
    x = 99,505,146,784.02/393,491.80
  6. Step 6: Final answer
    x = 252,877.31

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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.