Home / 280,287.39-420,503.07-80,623.41

Finding the Fourth Proportional to 280,287.39, 420,503.07 and 80,623.41

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Solution

The fourth proportional to 280,287.39, 420,503.07 and 80,623.41 is: 120,955.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,287.39 : 420,503.07 = 80,623.41 : x
  2. Step 2: Convert to fraction form
    280,287.39/420,503.07 = 80,623.41/x
  3. Step 3: Cross multiply
    280,287.39x = 420,503.07 × 80,623.41
  4. Step 4: Simplify right side
    280,287.39x = 33,902,391,418.87
  5. Step 5: Solve for x
    x = 33,902,391,418.87/280,287.39
  6. Step 6: Final answer
    x = 120,955.82

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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.