Home / 215,811.40-323,717.10-211,664.20

Finding the Fourth Proportional to 215,811.40, 323,717.10 and 211,664.20

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Solution

The fourth proportional to 215,811.40, 323,717.10 and 211,664.20 is: 317,496.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,811.40 : 323,717.10 = 211,664.20 : x
  2. Step 2: Convert to fraction form
    215,811.40/323,717.10 = 211,664.20/x
  3. Step 3: Cross multiply
    215,811.40x = 323,717.10 × 211,664.20
  4. Step 4: Simplify right side
    215,811.40x = 68,519,320,997.82
  5. Step 5: Solve for x
    x = 68,519,320,997.82/215,811.40
  6. Step 6: Final answer
    x = 317,496.30

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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.