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Finding the Fourth Proportional to 275,840.69, 380,660.46 and 154,981.88

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Solution

The fourth proportional to 275,840.69, 380,660.46 and 154,981.88 is: 213,875.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,840.69 : 380,660.46 = 154,981.88 : x
  2. Step 2: Convert to fraction form
    275,840.69/380,660.46 = 154,981.88/x
  3. Step 3: Cross multiply
    275,840.69x = 380,660.46 × 154,981.88
  4. Step 4: Simplify right side
    275,840.69x = 58,995,473,732.46
  5. Step 5: Solve for x
    x = 58,995,473,732.46/275,840.69
  6. Step 6: Final answer
    x = 213,875.17

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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.