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Finding the Fourth Proportional to 274,286.48, 378,550.40 and 153,434.48

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Solution

The fourth proportional to 274,286.48, 378,550.40 and 153,434.48 is: 211,759.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    274,286.48 : 378,550.40 = 153,434.48 : x
  2. Step 2: Convert to fraction form
    274,286.48/378,550.40 = 153,434.48/x
  3. Step 3: Cross multiply
    274,286.48x = 378,550.40 × 153,434.48
  4. Step 4: Simplify right side
    274,286.48x = 58,082,683,777.79
  5. Step 5: Solve for x
    x = 58,082,683,777.79/274,286.48
  6. Step 6: Final answer
    x = 211,759.19

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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.