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Finding the Fourth Proportional to 363,903.40, 545,855.10 and 206,439.40

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Solution

The fourth proportional to 363,903.40, 545,855.10 and 206,439.40 is: 309,659.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    363,903.40 : 545,855.10 = 206,439.40 : x
  2. Step 2: Convert to fraction form
    363,903.40/545,855.10 = 206,439.40/x
  3. Step 3: Cross multiply
    363,903.40x = 545,855.10 × 206,439.40
  4. Step 4: Simplify right side
    363,903.40x = 112,685,999,330.94
  5. Step 5: Solve for x
    x = 112,685,999,330.94/363,903.40
  6. Step 6: Final answer
    x = 309,659.10

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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.