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Finding the Fourth Proportional to 275,509.12, 380,208.20 and 154,659.12

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Solution

The fourth proportional to 275,509.12, 380,208.20 and 154,659.12 is: 213,432.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,509.12 : 380,208.20 = 154,659.12 : x
  2. Step 2: Convert to fraction form
    275,509.12/380,208.20 = 154,659.12/x
  3. Step 3: Cross multiply
    275,509.12x = 380,208.20 × 154,659.12
  4. Step 4: Simplify right side
    275,509.12x = 58,802,665,628.78
  5. Step 5: Solve for x
    x = 58,802,665,628.78/275,509.12
  6. Step 6: Final answer
    x = 213,432.74

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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.