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Finding the Fourth Proportional to 379,263.51, 523,398.87 and 218,118.51

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Solution

The fourth proportional to 379,263.51, 523,398.87 and 218,118.51 is: 301,012.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,263.51 : 523,398.87 = 218,118.51 : x
  2. Step 2: Convert to fraction form
    379,263.51/523,398.87 = 218,118.51/x
  3. Step 3: Cross multiply
    379,263.51x = 523,398.87 × 218,118.51
  4. Step 4: Simplify right side
    379,263.51x = 114,162,981,660.08
  5. Step 5: Solve for x
    x = 114,162,981,660.08/379,263.51
  6. Step 6: Final answer
    x = 301,012.30

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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.