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Finding the Fourth Proportional to 1,817.15, 2,725.64 and 518.61

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Solution

The fourth proportional to 1,817.15, 2,725.64 and 518.61 is: 777.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,817.15 : 2,725.64 = 518.61 : x
  2. Step 2: Convert to fraction form
    1,817.15/2,725.64 = 518.61/x
  3. Step 3: Cross multiply
    1,817.15x = 2,725.64 × 518.61
  4. Step 4: Simplify right side
    1,817.15x = 1,413,544.16
  5. Step 5: Solve for x
    x = 1,413,544.16/1,817.15
  6. Step 6: Final answer
    x = 777.89

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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.