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Finding the Fourth Proportional to 275,484.88, 380,139.92 and 154,639.46

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Solution

The fourth proportional to 275,484.88, 380,139.92 and 154,639.46 is: 213,386.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,484.88 : 380,139.92 = 154,639.46 : x
  2. Step 2: Convert to fraction form
    275,484.88/380,139.92 = 154,639.46/x
  3. Step 3: Cross multiply
    275,484.88x = 380,139.92 × 154,639.46
  4. Step 4: Simplify right side
    275,484.88x = 58,784,631,953.24
  5. Step 5: Solve for x
    x = 58,784,631,953.24/275,484.88
  6. Step 6: Final answer
    x = 213,386.06

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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.