Home / 427,088.40-639,466.20-308,115.60

Finding the Fourth Proportional to 427,088.40, 639,466.20 and 308,115.60

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Solution

The fourth proportional to 427,088.40, 639,466.20 and 308,115.60 is: 461,331.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,088.40 : 639,466.20 = 308,115.60 : x
  2. Step 2: Convert to fraction form
    427,088.40/639,466.20 = 308,115.60/x
  3. Step 3: Cross multiply
    427,088.40x = 639,466.20 × 308,115.60
  4. Step 4: Simplify right side
    427,088.40x = 197,029,511,892.72
  5. Step 5: Solve for x
    x = 197,029,511,892.72/427,088.40
  6. Step 6: Final answer
    x = 461,331.92

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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.