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Finding the Fourth Proportional to 393,490.08, 543,018 and 214,645.92

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Solution

The fourth proportional to 393,490.08, 543,018 and 214,645.92 is: 296,212.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,490.08 : 543,018 = 214,645.92 : x
  2. Step 2: Convert to fraction form
    393,490.08/543,018 = 214,645.92/x
  3. Step 3: Cross multiply
    393,490.08x = 543,018 × 214,645.92
  4. Step 4: Simplify right side
    393,490.08x = 116,556,598,186.56
  5. Step 5: Solve for x
    x = 116,556,598,186.56/393,490.08
  6. Step 6: Final answer
    x = 296,212.29

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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.