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Finding the Fourth Proportional to 215,540.58, 323,310.84 and 65,781.64

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Solution

The fourth proportional to 215,540.58, 323,310.84 and 65,781.64 is: 98,672.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,540.58 : 323,310.84 = 65,781.64 : x
  2. Step 2: Convert to fraction form
    215,540.58/323,310.84 = 65,781.64/x
  3. Step 3: Cross multiply
    215,540.58x = 323,310.84 × 65,781.64
  4. Step 4: Simplify right side
    215,540.58x = 21,267,917,284.98
  5. Step 5: Solve for x
    x = 21,267,917,284.98/215,540.58
  6. Step 6: Final answer
    x = 98,672.45

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1.5x scale

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.