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Finding the Fourth Proportional to 299,900.40, 449,850.60 and 78,284.40

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Solution

The fourth proportional to 299,900.40, 449,850.60 and 78,284.40 is: 117,426.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    299,900.40 : 449,850.60 = 78,284.40 : x
  2. Step 2: Convert to fraction form
    299,900.40/449,850.60 = 78,284.40/x
  3. Step 3: Cross multiply
    299,900.40x = 449,850.60 × 78,284.40
  4. Step 4: Simplify right side
    299,900.40x = 35,216,284,310.64
  5. Step 5: Solve for x
    x = 35,216,284,310.64/299,900.40
  6. Step 6: Final answer
    x = 117,426.60

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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.