Home / 280,240.60-420,431.30-80,561.35

Finding the Fourth Proportional to 280,240.60, 420,431.30 and 80,561.35

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Solution

The fourth proportional to 280,240.60, 420,431.30 and 80,561.35 is: 120,862.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,240.60 : 420,431.30 = 80,561.35 : x
  2. Step 2: Convert to fraction form
    280,240.60/420,431.30 = 80,561.35/x
  3. Step 3: Cross multiply
    280,240.60x = 420,431.30 × 80,561.35
  4. Step 4: Simplify right side
    280,240.60x = 33,870,510,605.29
  5. Step 5: Solve for x
    x = 33,870,510,605.29/280,240.60
  6. Step 6: Final answer
    x = 120,862.26

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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.