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Finding the Fourth Proportional to 275,839.18, 380,658.40 and 154,980.39

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Solution

The fourth proportional to 275,839.18, 380,658.40 and 154,980.39 is: 213,873.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,839.18 : 380,658.40 = 154,980.39 : x
  2. Step 2: Convert to fraction form
    275,839.18/380,658.40 = 154,980.39/x
  3. Step 3: Cross multiply
    275,839.18x = 380,658.40 × 154,980.39
  4. Step 4: Simplify right side
    275,839.18x = 58,994,587,288.78
  5. Step 5: Solve for x
    x = 58,994,587,288.78/275,839.18
  6. Step 6: Final answer
    x = 213,873.12

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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.