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Finding the Fourth Proportional to 638,363,020.80, 956,800,513.80 and 293,351,523.60

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Solution

The fourth proportional to 638,363,020.80, 956,800,513.80 and 293,351,523.60 is: 439,685,381.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,363,020.80 : 956,800,513.80 = 293,351,523.60 : x
  2. Step 2: Convert to fraction form
    638,363,020.80/956,800,513.80 = 293,351,523.60/x
  3. Step 3: Cross multiply
    638,363,020.80x = 956,800,513.80 × 293,351,523.60
  4. Step 4: Simplify right side
    638,363,020.80x = 280,678,888,504,492,832
  5. Step 5: Solve for x
    x = 280,678,888,504,492,832/638,363,020.80
  6. Step 6: Final answer
    x = 439,685,381.76

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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.