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Finding the Fourth Proportional to 215,844.20, 323,843.10 and 208,164.20

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Solution

The fourth proportional to 215,844.20, 323,843.10 and 208,164.20 is: 312,320.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,844.20 : 323,843.10 = 208,164.20 : x
  2. Step 2: Convert to fraction form
    215,844.20/323,843.10 = 208,164.20/x
  3. Step 3: Cross multiply
    215,844.20x = 323,843.10 × 208,164.20
  4. Step 4: Simplify right side
    215,844.20x = 67,412,539,837.02
  5. Step 5: Solve for x
    x = 67,412,539,837.02/215,844.20
  6. Step 6: Final answer
    x = 312,320.37

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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.