Home / 280,209.24-420,309.78-130,365.72

Finding the Fourth Proportional to 280,209.24, 420,309.78 and 130,365.72

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Solution

The fourth proportional to 280,209.24, 420,309.78 and 130,365.72 is: 195,546.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,209.24 : 420,309.78 = 130,365.72 : x
  2. Step 2: Convert to fraction form
    280,209.24/420,309.78 = 130,365.72/x
  3. Step 3: Cross multiply
    280,209.24x = 420,309.78 × 130,365.72
  4. Step 4: Simplify right side
    280,209.24x = 54,793,987,092.74
  5. Step 5: Solve for x
    x = 54,793,987,092.74/280,209.24
  6. Step 6: Final answer
    x = 195,546.68

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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.