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Finding the Fourth Proportional to 1,149.72, 1,723.92 and 455.72

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Solution

The fourth proportional to 1,149.72, 1,723.92 and 455.72 is: 683.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,149.72 : 1,723.92 = 455.72 : x
  2. Step 2: Convert to fraction form
    1,149.72/1,723.92 = 455.72/x
  3. Step 3: Cross multiply
    1,149.72x = 1,723.92 × 455.72
  4. Step 4: Simplify right side
    1,149.72x = 785,624.82
  5. Step 5: Solve for x
    x = 785,624.82/1,149.72
  6. Step 6: Final answer
    x = 683.32

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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.