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Finding the Fourth Proportional to 1,492.62, 2,238.92 and 518.69

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Solution

The fourth proportional to 1,492.62, 2,238.92 and 518.69 is: 778.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,492.62 : 2,238.92 = 518.69 : x
  2. Step 2: Convert to fraction form
    1,492.62/2,238.92 = 518.69/x
  3. Step 3: Cross multiply
    1,492.62x = 2,238.92 × 518.69
  4. Step 4: Simplify right side
    1,492.62x = 1,161,305.41
  5. Step 5: Solve for x
    x = 1,161,305.41/1,492.62
  6. Step 6: Final answer
    x = 778.03

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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.