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Finding the Fourth Proportional to 631,668.48, 871,676.64 and 345,198.24

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Solution

The fourth proportional to 631,668.48, 871,676.64 and 345,198.24 is: 476,359.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,668.48 : 871,676.64 = 345,198.24 : x
  2. Step 2: Convert to fraction form
    631,668.48/871,676.64 = 345,198.24/x
  3. Step 3: Cross multiply
    631,668.48x = 871,676.64 × 345,198.24
  4. Step 4: Simplify right side
    631,668.48x = 300,901,241,977.11
  5. Step 5: Solve for x
    x = 300,901,241,977.11/631,668.48
  6. Step 6: Final answer
    x = 476,359.44

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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.