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Finding the Fourth Proportional to 426,385,086.80, 639,577,630.20 and 426,385,086.80

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Solution

The fourth proportional to 426,385,086.80, 639,577,630.20 and 426,385,086.80 is: 639,577,630.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,385,086.80 : 639,577,630.20 = 426,385,086.80 : x
  2. Step 2: Convert to fraction form
    426,385,086.80/639,577,630.20 = 426,385,086.80/x
  3. Step 3: Cross multiply
    426,385,086.80x = 639,577,630.20 × 426,385,086.80
  4. Step 4: Simplify right side
    426,385,086.80x = 272,706,363,368,165,344
  5. Step 5: Solve for x
    x = 272,706,363,368,165,344/426,385,086.80
  6. Step 6: Final answer
    x = 639,577,630.20

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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.