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Finding the Fourth Proportional to 645,609.94, 969,021.64 and 338,082.65

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Solution

The fourth proportional to 645,609.94, 969,021.64 and 338,082.65 is: 507,441.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,609.94 : 969,021.64 = 338,082.65 : x
  2. Step 2: Convert to fraction form
    645,609.94/969,021.64 = 338,082.65/x
  3. Step 3: Cross multiply
    645,609.94x = 969,021.64 × 338,082.65
  4. Step 4: Simplify right side
    645,609.94x = 327,609,403,958.55
  5. Step 5: Solve for x
    x = 327,609,403,958.55/645,609.94
  6. Step 6: Final answer
    x = 507,441.70

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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.