Home / 420,911.89-580,836.69-229,888.37

Finding the Fourth Proportional to 420,911.89, 580,836.69 and 229,888.37

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Solution

The fourth proportional to 420,911.89, 580,836.69 and 229,888.37 is: 317,234.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,911.89 : 580,836.69 = 229,888.37 : x
  2. Step 2: Convert to fraction form
    420,911.89/580,836.69 = 229,888.37/x
  3. Step 3: Cross multiply
    420,911.89x = 580,836.69 × 229,888.37
  4. Step 4: Simplify right side
    420,911.89x = 133,527,601,352.39
  5. Step 5: Solve for x
    x = 133,527,601,352.39/420,911.89
  6. Step 6: Final answer
    x = 317,234.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.