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Finding the Fourth Proportional to 274,490.82, 378,765.45 and 153,638.82

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Solution

The fourth proportional to 274,490.82, 378,765.45 and 153,638.82 is: 212,003.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    274,490.82 : 378,765.45 = 153,638.82 : x
  2. Step 2: Convert to fraction form
    274,490.82/378,765.45 = 153,638.82/x
  3. Step 3: Cross multiply
    274,490.82x = 378,765.45 × 153,638.82
  4. Step 4: Simplify right side
    274,490.82x = 58,193,076,794.77
  5. Step 5: Solve for x
    x = 58,193,076,794.77/274,490.82
  6. Step 6: Final answer
    x = 212,003.73

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1.5x scale

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.