Home / 638,396,861.40-880,987,270.68-345,041,429.40

Finding the Fourth Proportional to 638,396,861.40, 880,987,270.68 and 345,041,429.40

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Solution

The fourth proportional to 638,396,861.40, 880,987,270.68 and 345,041,429.40 is: 476,156,957.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,396,861.40 : 880,987,270.68 = 345,041,429.40 : x
  2. Step 2: Convert to fraction form
    638,396,861.40/880,987,270.68 = 345,041,429.40/x
  3. Step 3: Cross multiply
    638,396,861.40x = 880,987,270.68 × 345,041,429.40
  4. Step 4: Simplify right side
    638,396,861.40x = 303,977,107,158,631,872
  5. Step 5: Solve for x
    x = 303,977,107,158,631,872/638,396,861.40
  6. Step 6: Final answer
    x = 476,156,957.43

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.