Home / 427,087.40-639,464.70-308,114.60

Finding the Fourth Proportional to 427,087.40, 639,464.70 and 308,114.60

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Solution

The fourth proportional to 427,087.40, 639,464.70 and 308,114.60 is: 461,330.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,087.40 : 639,464.70 = 308,114.60 : x
  2. Step 2: Convert to fraction form
    427,087.40/639,464.70 = 308,114.60/x
  3. Step 3: Cross multiply
    427,087.40x = 639,464.70 × 308,114.60
  4. Step 4: Simplify right side
    427,087.40x = 197,028,410,254.62
  5. Step 5: Solve for x
    x = 197,028,410,254.62/427,087.40
  6. Step 6: Final answer
    x = 461,330.42

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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.