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Finding the Fourth Proportional to 393,619.20, 590,428.80 and 367,180.80

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Solution

The fourth proportional to 393,619.20, 590,428.80 and 367,180.80 is: 550,771.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,619.20 : 590,428.80 = 367,180.80 : x
  2. Step 2: Convert to fraction form
    393,619.20/590,428.80 = 367,180.80/x
  3. Step 3: Cross multiply
    393,619.20x = 590,428.80 × 367,180.80
  4. Step 4: Simplify right side
    393,619.20x = 216,794,119,127.04
  5. Step 5: Solve for x
    x = 216,794,119,127.04/393,619.20
  6. Step 6: Final answer
    x = 550,771.20

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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.