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Finding the Fourth Proportional to 408,080.80, 612,121.20 and 282,109.60

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Solution

The fourth proportional to 408,080.80, 612,121.20 and 282,109.60 is: 423,164.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,080.80 : 612,121.20 = 282,109.60 : x
  2. Step 2: Convert to fraction form
    408,080.80/612,121.20 = 282,109.60/x
  3. Step 3: Cross multiply
    408,080.80x = 612,121.20 × 282,109.60
  4. Step 4: Simplify right side
    408,080.80x = 172,685,266,883.52
  5. Step 5: Solve for x
    x = 172,685,266,883.52/408,080.80
  6. Step 6: Final answer
    x = 423,164.40

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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.