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Finding the Fourth Proportional to 215,809.52, 298,005.18 and 135,375.30

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Solution

The fourth proportional to 215,809.52, 298,005.18 and 135,375.30 is: 186,935.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,809.52 : 298,005.18 = 135,375.30 : x
  2. Step 2: Convert to fraction form
    215,809.52/298,005.18 = 135,375.30/x
  3. Step 3: Cross multiply
    215,809.52x = 298,005.18 × 135,375.30
  4. Step 4: Simplify right side
    215,809.52x = 40,342,540,644.05
  5. Step 5: Solve for x
    x = 40,342,540,644.05/215,809.52
  6. Step 6: Final answer
    x = 186,935.88

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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.