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Finding the Fourth Proportional to 274,247.34, 378,480.67 and 153,399.86

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Solution

The fourth proportional to 274,247.34, 378,480.67 and 153,399.86 is: 211,702.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    274,247.34 : 378,480.67 = 153,399.86 : x
  2. Step 2: Convert to fraction form
    274,247.34/378,480.67 = 153,399.86/x
  3. Step 3: Cross multiply
    274,247.34x = 378,480.67 × 153,399.86
  4. Step 4: Simplify right side
    274,247.34x = 58,058,883,063.06
  5. Step 5: Solve for x
    x = 58,058,883,063.06/274,247.34
  6. Step 6: Final answer
    x = 211,702.63

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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.