Home / 290,660.32-435,986.16-80,293.60

Finding the Fourth Proportional to 290,660.32, 435,986.16 and 80,293.60

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Solution

The fourth proportional to 290,660.32, 435,986.16 and 80,293.60 is: 120,439.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,660.32 : 435,986.16 = 80,293.60 : x
  2. Step 2: Convert to fraction form
    290,660.32/435,986.16 = 80,293.60/x
  3. Step 3: Cross multiply
    290,660.32x = 435,986.16 × 80,293.60
  4. Step 4: Simplify right side
    290,660.32x = 35,006,898,336.58
  5. Step 5: Solve for x
    x = 35,006,898,336.58/290,660.32
  6. Step 6: Final answer
    x = 120,439.21

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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.