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Finding the Fourth Proportional to 548,744.45, 821,640.45 and 429,662.30

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Solution

The fourth proportional to 548,744.45, 821,640.45 and 429,662.30 is: 643,337.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    548,744.45 : 821,640.45 = 429,662.30 : x
  2. Step 2: Convert to fraction form
    548,744.45/821,640.45 = 429,662.30/x
  3. Step 3: Cross multiply
    548,744.45x = 821,640.45 × 429,662.30
  4. Step 4: Simplify right side
    548,744.45x = 353,027,925,520.04
  5. Step 5: Solve for x
    x = 353,027,925,520.04/548,744.45
  6. Step 6: Final answer
    x = 643,337.58

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.