Home / 405,236.35-607,959.50-215,540.57

Finding the Fourth Proportional to 405,236.35, 607,959.50 and 215,540.57

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Solution

The fourth proportional to 405,236.35, 607,959.50 and 215,540.57 is: 323,366.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,236.35 : 607,959.50 = 215,540.57 : x
  2. Step 2: Convert to fraction form
    405,236.35/607,959.50 = 215,540.57/x
  3. Step 3: Cross multiply
    405,236.35x = 607,959.50 × 215,540.57
  4. Step 4: Simplify right side
    405,236.35x = 131,039,940,769.73
  5. Step 5: Solve for x
    x = 131,039,940,769.73/405,236.35
  6. Step 6: Final answer
    x = 323,366.70

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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.