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Finding the Fourth Proportional to 275,724.93, 380,471.06 and 154,879.50

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Solution

The fourth proportional to 275,724.93, 380,471.06 and 154,879.50 is: 213,717.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,724.93 : 380,471.06 = 154,879.50 : x
  2. Step 2: Convert to fraction form
    275,724.93/380,471.06 = 154,879.50/x
  3. Step 3: Cross multiply
    275,724.93x = 380,471.06 × 154,879.50
  4. Step 4: Simplify right side
    275,724.93x = 58,927,166,762.87
  5. Step 5: Solve for x
    x = 58,927,166,762.87/275,724.93
  6. Step 6: Final answer
    x = 213,717.22

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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.