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Finding the Fourth Proportional to 393,321.60, 589,982.40 and 362,908.80

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Solution

The fourth proportional to 393,321.60, 589,982.40 and 362,908.80 is: 544,363.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,321.60 : 589,982.40 = 362,908.80 : x
  2. Step 2: Convert to fraction form
    393,321.60/589,982.40 = 362,908.80/x
  3. Step 3: Cross multiply
    393,321.60x = 589,982.40 × 362,908.80
  4. Step 4: Simplify right side
    393,321.60x = 214,109,804,805.12
  5. Step 5: Solve for x
    x = 214,109,804,805.12/393,321.60
  6. Step 6: Final answer
    x = 544,363.20

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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.