Home / 420,340.77-580,083.03-239,078.78

Finding the Fourth Proportional to 420,340.77, 580,083.03 and 239,078.78

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Solution

The fourth proportional to 420,340.77, 580,083.03 and 239,078.78 is: 329,935.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,340.77 : 580,083.03 = 239,078.78 : x
  2. Step 2: Convert to fraction form
    420,340.77/580,083.03 = 239,078.78/x
  3. Step 3: Cross multiply
    420,340.77x = 580,083.03 × 239,078.78
  4. Step 4: Simplify right side
    420,340.77x = 138,685,540,210.69
  5. Step 5: Solve for x
    x = 138,685,540,210.69/420,340.77
  6. Step 6: Final answer
    x = 329,935.97

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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.