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Finding the Fourth Proportional to 669,405, 923,785.38 and 367,605.48

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Solution

The fourth proportional to 669,405, 923,785.38 and 367,605.48 is: 507,299.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    669,405 : 923,785.38 = 367,605.48 : x
  2. Step 2: Convert to fraction form
    669,405/923,785.38 = 367,605.48/x
  3. Step 3: Cross multiply
    669,405x = 923,785.38 × 367,605.48
  4. Step 4: Simplify right side
    669,405x = 339,588,568,031.88
  5. Step 5: Solve for x
    x = 339,588,568,031.88/669,405
  6. Step 6: Final answer
    x = 507,299.12

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1.5x scale

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.