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Finding the Fourth Proportional to 275,731.80, 385,237.20 and 275,731.80

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Solution

The fourth proportional to 275,731.80, 385,237.20 and 275,731.80 is: 385,237.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,731.80 : 385,237.20 = 275,731.80 : x
  2. Step 2: Convert to fraction form
    275,731.80/385,237.20 = 275,731.80/x
  3. Step 3: Cross multiply
    275,731.80x = 385,237.20 × 275,731.80
  4. Step 4: Simplify right side
    275,731.80x = 106,222,146,582.96
  5. Step 5: Solve for x
    x = 106,222,146,582.96/275,731.80
  6. Step 6: Final answer
    x = 385,237.20

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.