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Finding the Fourth Proportional to 664,009,125.20, 996,013,687.80 and 654,939,198.80

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Solution

The fourth proportional to 664,009,125.20, 996,013,687.80 and 654,939,198.80 is: 982,408,798.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,009,125.20 : 996,013,687.80 = 654,939,198.80 : x
  2. Step 2: Convert to fraction form
    664,009,125.20/996,013,687.80 = 654,939,198.80/x
  3. Step 3: Cross multiply
    664,009,125.20x = 996,013,687.80 × 654,939,198.80
  4. Step 4: Simplify right side
    664,009,125.20x = 652,328,406,681,565,312
  5. Step 5: Solve for x
    x = 652,328,406,681,565,312/664,009,125.20
  6. Step 6: Final answer
    x = 982,408,798.20

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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.