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Finding the Fourth Proportional to 214,490.80, 321,736.20 and 190,871.20

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Solution

The fourth proportional to 214,490.80, 321,736.20 and 190,871.20 is: 286,306.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    214,490.80 : 321,736.20 = 190,871.20 : x
  2. Step 2: Convert to fraction form
    214,490.80/321,736.20 = 190,871.20/x
  3. Step 3: Cross multiply
    214,490.80x = 321,736.20 × 190,871.20
  4. Step 4: Simplify right side
    214,490.80x = 61,410,174,577.44
  5. Step 5: Solve for x
    x = 61,410,174,577.44/214,490.80
  6. Step 6: Final answer
    x = 286,306.80

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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.