Home / 280,305.12-420,394.56-80,580.96

Finding the Fourth Proportional to 280,305.12, 420,394.56 and 80,580.96

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Solution

The fourth proportional to 280,305.12, 420,394.56 and 80,580.96 is: 120,853.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,305.12 : 420,394.56 = 80,580.96 : x
  2. Step 2: Convert to fraction form
    280,305.12/420,394.56 = 80,580.96/x
  3. Step 3: Cross multiply
    280,305.12x = 420,394.56 × 80,580.96
  4. Step 4: Simplify right side
    280,305.12x = 33,875,797,223.58
  5. Step 5: Solve for x
    x = 33,875,797,223.58/280,305.12
  6. Step 6: Final answer
    x = 120,853.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.