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Finding the Fourth Proportional to 3,103.37, 4,655.70 and 911.91

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Solution

The fourth proportional to 3,103.37, 4,655.70 and 911.91 is: 1,368.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,103.37 : 4,655.70 = 911.91 : x
  2. Step 2: Convert to fraction form
    3,103.37/4,655.70 = 911.91/x
  3. Step 3: Cross multiply
    3,103.37x = 4,655.70 × 911.91
  4. Step 4: Simplify right side
    3,103.37x = 4,245,579.39
  5. Step 5: Solve for x
    x = 4,245,579.39/3,103.37
  6. Step 6: Final answer
    x = 1,368.06

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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.