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Finding the Fourth Proportional to 396,476.79, 546,383.75 and 389,190.03

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Solution

The fourth proportional to 396,476.79, 546,383.75 and 389,190.03 is: 536,341.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,476.79 : 546,383.75 = 389,190.03 : x
  2. Step 2: Convert to fraction form
    396,476.79/546,383.75 = 389,190.03/x
  3. Step 3: Cross multiply
    396,476.79x = 546,383.75 × 389,190.03
  4. Step 4: Simplify right side
    396,476.79x = 212,647,108,054.01
  5. Step 5: Solve for x
    x = 212,647,108,054.01/396,476.79
  6. Step 6: Final answer
    x = 536,341.88

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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.