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Finding the Fourth Proportional to 203,479.10, 305,218.65 and 180,928.70

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Solution

The fourth proportional to 203,479.10, 305,218.65 and 180,928.70 is: 271,393.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,479.10 : 305,218.65 = 180,928.70 : x
  2. Step 2: Convert to fraction form
    203,479.10/305,218.65 = 180,928.70/x
  3. Step 3: Cross multiply
    203,479.10x = 305,218.65 × 180,928.70
  4. Step 4: Simplify right side
    203,479.10x = 55,222,813,560.26
  5. Step 5: Solve for x
    x = 55,222,813,560.26/203,479.10
  6. Step 6: Final answer
    x = 271,393.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.