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Finding the Fourth Proportional to 279,155.48, 416,842.30 and 221,583.44

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Solution

The fourth proportional to 279,155.48, 416,842.30 and 221,583.44 is: 330,874.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,155.48 : 416,842.30 = 221,583.44 : x
  2. Step 2: Convert to fraction form
    279,155.48/416,842.30 = 221,583.44/x
  3. Step 3: Cross multiply
    279,155.48x = 416,842.30 × 221,583.44
  4. Step 4: Simplify right side
    279,155.48x = 92,365,350,771.51
  5. Step 5: Solve for x
    x = 92,365,350,771.51/279,155.48
  6. Step 6: Final answer
    x = 330,874.22

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.