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Finding the Fourth Proportional to 408,080,031.80, 612,120,047.70 and 408,080,031.80

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Solution

The fourth proportional to 408,080,031.80, 612,120,047.70 and 408,080,031.80 is: 612,120,047.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,080,031.80 : 612,120,047.70 = 408,080,031.80 : x
  2. Step 2: Convert to fraction form
    408,080,031.80/612,120,047.70 = 408,080,031.80/x
  3. Step 3: Cross multiply
    408,080,031.80x = 612,120,047.70 × 408,080,031.80
  4. Step 4: Simplify right side
    408,080,031.80x = 249,793,968,530,833,536
  5. Step 5: Solve for x
    x = 249,793,968,530,833,536/408,080,031.80
  6. Step 6: Final answer
    x = 612,120,047.70

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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.