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Finding the Fourth Proportional to 2,489.65, 3,733.96 and 929.36

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Solution

The fourth proportional to 2,489.65, 3,733.96 and 929.36 is: 1,393.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,489.65 : 3,733.96 = 929.36 : x
  2. Step 2: Convert to fraction form
    2,489.65/3,733.96 = 929.36/x
  3. Step 3: Cross multiply
    2,489.65x = 3,733.96 × 929.36
  4. Step 4: Simplify right side
    2,489.65x = 3,470,197.88
  5. Step 5: Solve for x
    x = 3,470,197.88/2,489.65
  6. Step 6: Final answer
    x = 1,393.85

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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.