Home / 280,638.45-387,408.74-178,803.54

Finding the Fourth Proportional to 280,638.45, 387,408.74 and 178,803.54

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Solution

The fourth proportional to 280,638.45, 387,408.74 and 178,803.54 is: 246,830.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,638.45 : 387,408.74 = 178,803.54 : x
  2. Step 2: Convert to fraction form
    280,638.45/387,408.74 = 178,803.54/x
  3. Step 3: Cross multiply
    280,638.45x = 387,408.74 × 178,803.54
  4. Step 4: Simplify right side
    280,638.45x = 69,270,053,244.92
  5. Step 5: Solve for x
    x = 69,270,053,244.92/280,638.45
  6. Step 6: Final answer
    x = 246,830.23

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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.