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Finding the Fourth Proportional to 664,009,139.70, 996,013,709.55 and 654,939,213.30

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Solution

The fourth proportional to 664,009,139.70, 996,013,709.55 and 654,939,213.30 is: 982,408,819.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,009,139.70 : 996,013,709.55 = 654,939,213.30 : x
  2. Step 2: Convert to fraction form
    664,009,139.70/996,013,709.55 = 654,939,213.30/x
  3. Step 3: Cross multiply
    664,009,139.70x = 996,013,709.55 × 654,939,213.30
  4. Step 4: Simplify right side
    664,009,139.70x = 652,328,435,368,691,584
  5. Step 5: Solve for x
    x = 652,328,435,368,691,584/664,009,139.70
  6. Step 6: Final answer
    x = 982,408,819.95

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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.