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Finding the Fourth Proportional to 1,383.52, 2,074.34 and 458.76

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Solution

The fourth proportional to 1,383.52, 2,074.34 and 458.76 is: 687.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,383.52 : 2,074.34 = 458.76 : x
  2. Step 2: Convert to fraction form
    1,383.52/2,074.34 = 458.76/x
  3. Step 3: Cross multiply
    1,383.52x = 2,074.34 × 458.76
  4. Step 4: Simplify right side
    1,383.52x = 951,624.22
  5. Step 5: Solve for x
    x = 951,624.22/1,383.52
  6. Step 6: Final answer
    x = 687.83

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1.5x scale

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.