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Finding the Fourth Proportional to 3,491.67, 5,240 and 1,270.50

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Solution

The fourth proportional to 3,491.67, 5,240 and 1,270.50 is: 1,906.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,491.67 : 5,240 = 1,270.50 : x
  2. Step 2: Convert to fraction form
    3,491.67/5,240 = 1,270.50/x
  3. Step 3: Cross multiply
    3,491.67x = 5,240 × 1,270.50
  4. Step 4: Simplify right side
    3,491.67x = 6,657,393.80
  5. Step 5: Solve for x
    x = 6,657,393.80/3,491.67
  6. Step 6: Final answer
    x = 1,906.65

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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.