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Finding the Fourth Proportional to 321,999.96, 482,371.62 and 210,855

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Solution

The fourth proportional to 321,999.96, 482,371.62 and 210,855 is: 315,871.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,999.96 : 482,371.62 = 210,855 : x
  2. Step 2: Convert to fraction form
    321,999.96/482,371.62 = 210,855/x
  3. Step 3: Cross multiply
    321,999.96x = 482,371.62 × 210,855
  4. Step 4: Simplify right side
    321,999.96x = 101,710,467,935.10
  5. Step 5: Solve for x
    x = 101,710,467,935.10/321,999.96
  6. Step 6: Final answer
    x = 315,871.06

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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.