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Finding the Fourth Proportional to 1,299.07, 1,949.53 and 518.62

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Solution

The fourth proportional to 1,299.07, 1,949.53 and 518.62 is: 778.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,299.07 : 1,949.53 = 518.62 : x
  2. Step 2: Convert to fraction form
    1,299.07/1,949.53 = 518.62/x
  3. Step 3: Cross multiply
    1,299.07x = 1,949.53 × 518.62
  4. Step 4: Simplify right side
    1,299.07x = 1,011,055.50
  5. Step 5: Solve for x
    x = 1,011,055.50/1,299.07
  6. Step 6: Final answer
    x = 778.29

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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.