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Finding the Fourth Proportional to 1,383.32, 2,074.52 and 458.62

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Solution

The fourth proportional to 1,383.32, 2,074.52 and 458.62 is: 687.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,383.32 : 2,074.52 = 458.62 : x
  2. Step 2: Convert to fraction form
    1,383.32/2,074.52 = 458.62/x
  3. Step 3: Cross multiply
    1,383.32x = 2,074.52 × 458.62
  4. Step 4: Simplify right side
    1,383.32x = 951,416.36
  5. Step 5: Solve for x
    x = 951,416.36/1,383.32
  6. Step 6: Final answer
    x = 687.78

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.