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Finding the Fourth Proportional to 363,986.40, 545,979.60 and 206,522.40

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Solution

The fourth proportional to 363,986.40, 545,979.60 and 206,522.40 is: 309,783.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    363,986.40 : 545,979.60 = 206,522.40 : x
  2. Step 2: Convert to fraction form
    363,986.40/545,979.60 = 206,522.40/x
  3. Step 3: Cross multiply
    363,986.40x = 545,979.60 × 206,522.40
  4. Step 4: Simplify right side
    363,986.40x = 112,757,017,343.04
  5. Step 5: Solve for x
    x = 112,757,017,343.04/363,986.40
  6. Step 6: Final answer
    x = 309,783.60

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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.