Home / 420,640.12-580,480.37-229,653.51

Finding the Fourth Proportional to 420,640.12, 580,480.37 and 229,653.51

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Solution

The fourth proportional to 420,640.12, 580,480.37 and 229,653.51 is: 316,920.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,640.12 : 580,480.37 = 229,653.51 : x
  2. Step 2: Convert to fraction form
    420,640.12/580,480.37 = 229,653.51/x
  3. Step 3: Cross multiply
    420,640.12x = 580,480.37 × 229,653.51
  4. Step 4: Simplify right side
    420,640.12x = 133,309,351,992.73
  5. Step 5: Solve for x
    x = 133,309,351,992.73/420,640.12
  6. Step 6: Final answer
    x = 316,920.20

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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.