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Finding the Fourth Proportional to 455,956.64, 628,893.83 and 320,020.92

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Solution

The fourth proportional to 455,956.64, 628,893.83 and 320,020.92 is: 441,399.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,956.64 : 628,893.83 = 320,020.92 : x
  2. Step 2: Convert to fraction form
    455,956.64/628,893.83 = 320,020.92/x
  3. Step 3: Cross multiply
    455,956.64x = 628,893.83 × 320,020.92
  4. Step 4: Simplify right side
    455,956.64x = 201,259,182,058.92
  5. Step 5: Solve for x
    x = 201,259,182,058.92/455,956.64
  6. Step 6: Final answer
    x = 441,399.83

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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.