Home / 420,640.09-580,480.32-229,653.48

Finding the Fourth Proportional to 420,640.09, 580,480.32 and 229,653.48

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Solution

The fourth proportional to 420,640.09, 580,480.32 and 229,653.48 is: 316,920.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,640.09 : 580,480.32 = 229,653.48 : x
  2. Step 2: Convert to fraction form
    420,640.09/580,480.32 = 229,653.48/x
  3. Step 3: Cross multiply
    420,640.09x = 580,480.32 × 229,653.48
  4. Step 4: Simplify right side
    420,640.09x = 133,309,325,559.51
  5. Step 5: Solve for x
    x = 133,309,325,559.51/420,640.09
  6. Step 6: Final answer
    x = 316,920.16

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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.