Home / 290,665.32-435,993.66-80,298.60

Finding the Fourth Proportional to 290,665.32, 435,993.66 and 80,298.60

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Solution

The fourth proportional to 290,665.32, 435,993.66 and 80,298.60 is: 120,446.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,665.32 : 435,993.66 = 80,298.60 : x
  2. Step 2: Convert to fraction form
    290,665.32/435,993.66 = 80,298.60/x
  3. Step 3: Cross multiply
    290,665.32x = 435,993.66 × 80,298.60
  4. Step 4: Simplify right side
    290,665.32x = 35,009,680,506.88
  5. Step 5: Solve for x
    x = 35,009,680,506.88/290,665.32
  6. Step 6: Final answer
    x = 120,446.71

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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.