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Finding the Fourth Proportional to 275,487.40, 413,231.10 and 186,257.80

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Solution

The fourth proportional to 275,487.40, 413,231.10 and 186,257.80 is: 279,386.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,487.40 : 413,231.10 = 186,257.80 : x
  2. Step 2: Convert to fraction form
    275,487.40/413,231.10 = 186,257.80/x
  3. Step 3: Cross multiply
    275,487.40x = 413,231.10 × 186,257.80
  4. Step 4: Simplify right side
    275,487.40x = 76,967,515,577.58
  5. Step 5: Solve for x
    x = 76,967,515,577.58/275,487.40
  6. Step 6: Final answer
    x = 279,386.70

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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.