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Finding the Fourth Proportional to 638,338,853.80, 957,508,280.70 and 365,485,234.60

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Solution

The fourth proportional to 638,338,853.80, 957,508,280.70 and 365,485,234.60 is: 548,227,851.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,338,853.80 : 957,508,280.70 = 365,485,234.60 : x
  2. Step 2: Convert to fraction form
    638,338,853.80/957,508,280.70 = 365,485,234.60/x
  3. Step 3: Cross multiply
    638,338,853.80x = 957,508,280.70 × 365,485,234.60
  4. Step 4: Simplify right side
    638,338,853.80x = 349,955,138,603,082,176
  5. Step 5: Solve for x
    x = 349,955,138,603,082,176/638,338,853.80
  6. Step 6: Final answer
    x = 548,227,851.90

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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.