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Finding the Fourth Proportional to 351,802.22, 485,221.43 and 221,017.90

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Solution

The fourth proportional to 351,802.22, 485,221.43 and 221,017.90 is: 304,837.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,802.22 : 485,221.43 = 221,017.90 : x
  2. Step 2: Convert to fraction form
    351,802.22/485,221.43 = 221,017.90/x
  3. Step 3: Cross multiply
    351,802.22x = 485,221.43 × 221,017.90
  4. Step 4: Simplify right side
    351,802.22x = 107,242,621,493.60
  5. Step 5: Solve for x
    x = 107,242,621,493.60/351,802.22
  6. Step 6: Final answer
    x = 304,837.82

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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.