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Finding the Fourth Proportional to 399,563.06, 551,390.08 and 218,270.34

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Solution

The fourth proportional to 399,563.06, 551,390.08 and 218,270.34 is: 301,209.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,563.06 : 551,390.08 = 218,270.34 : x
  2. Step 2: Convert to fraction form
    399,563.06/551,390.08 = 218,270.34/x
  3. Step 3: Cross multiply
    399,563.06x = 551,390.08 × 218,270.34
  4. Step 4: Simplify right side
    399,563.06x = 120,352,100,234.23
  5. Step 5: Solve for x
    x = 120,352,100,234.23/399,563.06
  6. Step 6: Final answer
    x = 301,209.28

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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.