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Finding the Fourth Proportional to 5,181.68, 7,770.84 and 1,718

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Solution

The fourth proportional to 5,181.68, 7,770.84 and 1,718 is: 2,576.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,181.68 : 7,770.84 = 1,718 : x
  2. Step 2: Convert to fraction form
    5,181.68/7,770.84 = 1,718/x
  3. Step 3: Cross multiply
    5,181.68x = 7,770.84 × 1,718
  4. Step 4: Simplify right side
    5,181.68x = 13,350,303.12
  5. Step 5: Solve for x
    x = 13,350,303.12/5,181.68
  6. Step 6: Final answer
    x = 2,576.44

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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.