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Finding the Fourth Proportional to 306,099.40, 459,149.10 and 199,811.20

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Solution

The fourth proportional to 306,099.40, 459,149.10 and 199,811.20 is: 299,716.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,099.40 : 459,149.10 = 199,811.20 : x
  2. Step 2: Convert to fraction form
    306,099.40/459,149.10 = 199,811.20/x
  3. Step 3: Cross multiply
    306,099.40x = 459,149.10 × 199,811.20
  4. Step 4: Simplify right side
    306,099.40x = 91,743,132,649.92
  5. Step 5: Solve for x
    x = 91,743,132,649.92/306,099.40
  6. Step 6: Final answer
    x = 299,716.80

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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.