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Finding the Fourth Proportional to 1,148.96, 1,722.07 and 628.86

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Solution

The fourth proportional to 1,148.96, 1,722.07 and 628.86 is: 942.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,148.96 : 1,722.07 = 628.86 : x
  2. Step 2: Convert to fraction form
    1,148.96/1,722.07 = 628.86/x
  3. Step 3: Cross multiply
    1,148.96x = 1,722.07 × 628.86
  4. Step 4: Simplify right side
    1,148.96x = 1,082,939.37
  5. Step 5: Solve for x
    x = 1,082,939.37/1,148.96
  6. Step 6: Final answer
    x = 942.54

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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.