Home / 420,709.72-580,581.54-229,723.12

Finding the Fourth Proportional to 420,709.72, 580,581.54 and 229,723.12

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Solution

The fourth proportional to 420,709.72, 580,581.54 and 229,723.12 is: 317,019.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,709.72 : 580,581.54 = 229,723.12 : x
  2. Step 2: Convert to fraction form
    420,709.72/580,581.54 = 229,723.12/x
  3. Step 3: Cross multiply
    420,709.72x = 580,581.54 × 229,723.12
  4. Step 4: Simplify right side
    420,709.72x = 133,373,002,783.21
  5. Step 5: Solve for x
    x = 133,373,002,783.21/420,709.72
  6. Step 6: Final answer
    x = 317,019.07

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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.