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Finding the Fourth Proportional to 446,099.80, 669,149.70 and 313,130.20

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Solution

The fourth proportional to 446,099.80, 669,149.70 and 313,130.20 is: 469,695.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    446,099.80 : 669,149.70 = 313,130.20 : x
  2. Step 2: Convert to fraction form
    446,099.80/669,149.70 = 313,130.20/x
  3. Step 3: Cross multiply
    446,099.80x = 669,149.70 × 313,130.20
  4. Step 4: Simplify right side
    446,099.80x = 209,530,979,390.94
  5. Step 5: Solve for x
    x = 209,530,979,390.94/446,099.80
  6. Step 6: Final answer
    x = 469,695.30

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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.