Home / 280,629.12-387,138.24-161,328

Finding the Fourth Proportional to 280,629.12, 387,138.24 and 161,328

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Solution

The fourth proportional to 280,629.12, 387,138.24 and 161,328 is: 222,557.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,629.12 : 387,138.24 = 161,328 : x
  2. Step 2: Convert to fraction form
    280,629.12/387,138.24 = 161,328/x
  3. Step 3: Cross multiply
    280,629.12x = 387,138.24 × 161,328
  4. Step 4: Simplify right side
    280,629.12x = 62,456,237,982.72
  5. Step 5: Solve for x
    x = 62,456,237,982.72/280,629.12
  6. Step 6: Final answer
    x = 222,557.94

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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.