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Finding the Fourth Proportional to 396,656.95, 546,628.24 and 389,368.78

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Solution

The fourth proportional to 396,656.95, 546,628.24 and 389,368.78 is: 536,584.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,656.95 : 546,628.24 = 389,368.78 : x
  2. Step 2: Convert to fraction form
    396,656.95/546,628.24 = 389,368.78/x
  3. Step 3: Cross multiply
    396,656.95x = 546,628.24 × 389,368.78
  4. Step 4: Simplify right side
    396,656.95x = 212,839,970,922.35
  5. Step 5: Solve for x
    x = 212,839,970,922.35/396,656.95
  6. Step 6: Final answer
    x = 536,584.50

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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.