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Finding the Fourth Proportional to 429,725,847.20, 644,588,770.80 and 429,725,847.20

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Solution

The fourth proportional to 429,725,847.20, 644,588,770.80 and 429,725,847.20 is: 644,588,770.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,725,847.20 : 644,588,770.80 = 429,725,847.20 : x
  2. Step 2: Convert to fraction form
    429,725,847.20/644,588,770.80 = 429,725,847.20/x
  3. Step 3: Cross multiply
    429,725,847.20x = 644,588,770.80 × 429,725,847.20
  4. Step 4: Simplify right side
    429,725,847.20x = 276,996,455,627,636,608
  5. Step 5: Solve for x
    x = 276,996,455,627,636,608/429,725,847.20
  6. Step 6: Final answer
    x = 644,588,770.80

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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.