Home / 307,910.40-461,769.60-120,979.20

Finding the Fourth Proportional to 307,910.40, 461,769.60 and 120,979.20

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Solution

The fourth proportional to 307,910.40, 461,769.60 and 120,979.20 is: 181,431.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,910.40 : 461,769.60 = 120,979.20 : x
  2. Step 2: Convert to fraction form
    307,910.40/461,769.60 = 120,979.20/x
  3. Step 3: Cross multiply
    307,910.40x = 461,769.60 × 120,979.20
  4. Step 4: Simplify right side
    307,910.40x = 55,864,516,792.32
  5. Step 5: Solve for x
    x = 55,864,516,792.32/307,910.40
  6. Step 6: Final answer
    x = 181,431.08

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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.