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Finding the Fourth Proportional to 396,657.45, 546,628.93 and 389,369.28

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Solution

The fourth proportional to 396,657.45, 546,628.93 and 389,369.28 is: 536,585.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,657.45 : 546,628.93 = 389,369.28 : x
  2. Step 2: Convert to fraction form
    396,657.45/546,628.93 = 389,369.28/x
  3. Step 3: Cross multiply
    396,657.45x = 546,628.93 × 389,369.28
  4. Step 4: Simplify right side
    396,657.45x = 212,840,512,901.27
  5. Step 5: Solve for x
    x = 212,840,512,901.27/396,657.45
  6. Step 6: Final answer
    x = 536,585.19

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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.