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Finding the Fourth Proportional to 1,149.08, 1,722.48 and 455.34

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Solution

The fourth proportional to 1,149.08, 1,722.48 and 455.34 is: 682.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,149.08 : 1,722.48 = 455.34 : x
  2. Step 2: Convert to fraction form
    1,149.08/1,722.48 = 455.34/x
  3. Step 3: Cross multiply
    1,149.08x = 1,722.48 × 455.34
  4. Step 4: Simplify right side
    1,149.08x = 784,314.04
  5. Step 5: Solve for x
    x = 784,314.04/1,149.08
  6. Step 6: Final answer
    x = 682.56

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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.