Home / 280,505.13-387,044.97-159,639.23

Finding the Fourth Proportional to 280,505.13, 387,044.97 and 159,639.23

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Solution

The fourth proportional to 280,505.13, 387,044.97 and 159,639.23 is: 220,272.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,505.13 : 387,044.97 = 159,639.23 : x
  2. Step 2: Convert to fraction form
    280,505.13/387,044.97 = 159,639.23/x
  3. Step 3: Cross multiply
    280,505.13x = 387,044.97 × 159,639.23
  4. Step 4: Simplify right side
    280,505.13x = 61,787,560,940.05
  5. Step 5: Solve for x
    x = 61,787,560,940.05/280,505.13
  6. Step 6: Final answer
    x = 220,272.48

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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.