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Finding the Fourth Proportional to 5,339, 8,008.50 and 1,691

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Solution

The fourth proportional to 5,339, 8,008.50 and 1,691 is: 2,536.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,339 : 8,008.50 = 1,691 : x
  2. Step 2: Convert to fraction form
    5,339/8,008.50 = 1,691/x
  3. Step 3: Cross multiply
    5,339x = 8,008.50 × 1,691
  4. Step 4: Simplify right side
    5,339x = 13,542,373.50
  5. Step 5: Solve for x
    x = 13,542,373.50/5,339
  6. Step 6: Final answer
    x = 2,536.50

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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.