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Finding the Fourth Proportional to 275,628.92, 380,407.23 and 154,778.43

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Solution

The fourth proportional to 275,628.92, 380,407.23 and 154,778.43 is: 213,616.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,628.92 : 380,407.23 = 154,778.43 : x
  2. Step 2: Convert to fraction form
    275,628.92/380,407.23 = 154,778.43/x
  3. Step 3: Cross multiply
    275,628.92x = 380,407.23 × 154,778.43
  4. Step 4: Simplify right side
    275,628.92x = 58,878,833,820.05
  5. Step 5: Solve for x
    x = 58,878,833,820.05/275,628.92
  6. Step 6: Final answer
    x = 213,616.32

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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.