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Finding the Fourth Proportional to 485,054.28, 669,286.08 and 270,189

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Solution

The fourth proportional to 485,054.28, 669,286.08 and 270,189 is: 372,811.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,054.28 : 669,286.08 = 270,189 : x
  2. Step 2: Convert to fraction form
    485,054.28/669,286.08 = 270,189/x
  3. Step 3: Cross multiply
    485,054.28x = 669,286.08 × 270,189
  4. Step 4: Simplify right side
    485,054.28x = 180,833,736,669.12
  5. Step 5: Solve for x
    x = 180,833,736,669.12/485,054.28
  6. Step 6: Final answer
    x = 372,811.34

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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.