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Finding the Fourth Proportional to 408,071.80, 612,107.70 and 248,404.60

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Solution

The fourth proportional to 408,071.80, 612,107.70 and 248,404.60 is: 372,606.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,071.80 : 612,107.70 = 248,404.60 : x
  2. Step 2: Convert to fraction form
    408,071.80/612,107.70 = 248,404.60/x
  3. Step 3: Cross multiply
    408,071.80x = 612,107.70 × 248,404.60
  4. Step 4: Simplify right side
    408,071.80x = 152,050,368,375.42
  5. Step 5: Solve for x
    x = 152,050,368,375.42/408,071.80
  6. Step 6: Final answer
    x = 372,606.90

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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.