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Finding the Fourth Proportional to 426,384,047.80, 639,576,071.70 and 426,384,047.80

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Solution

The fourth proportional to 426,384,047.80, 639,576,071.70 and 426,384,047.80 is: 639,576,071.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,384,047.80 : 639,576,071.70 = 426,384,047.80 : x
  2. Step 2: Convert to fraction form
    426,384,047.80/639,576,071.70 = 426,384,047.80/x
  3. Step 3: Cross multiply
    426,384,047.80x = 639,576,071.70 × 426,384,047.80
  4. Step 4: Simplify right side
    426,384,047.80x = 272,705,034,327,469,056
  5. Step 5: Solve for x
    x = 272,705,034,327,469,056/426,384,047.80
  6. Step 6: Final answer
    x = 639,576,071.70

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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.