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Finding the Fourth Proportional to 449,200.60, 673,800.90 and 431,485.90

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Solution

The fourth proportional to 449,200.60, 673,800.90 and 431,485.90 is: 647,228.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    449,200.60 : 673,800.90 = 431,485.90 : x
  2. Step 2: Convert to fraction form
    449,200.60/673,800.90 = 431,485.90/x
  3. Step 3: Cross multiply
    449,200.60x = 673,800.90 × 431,485.90
  4. Step 4: Simplify right side
    449,200.60x = 290,735,587,757.31
  5. Step 5: Solve for x
    x = 290,735,587,757.31/449,200.60
  6. Step 6: Final answer
    x = 647,228.85

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Double scale
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Similar ratio
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1.5x scale

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.