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Finding the Fourth Proportional to 3,954.60, 5,931 and 1,489.50

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Solution

The fourth proportional to 3,954.60, 5,931 and 1,489.50 is: 2,233.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,954.60 : 5,931 = 1,489.50 : x
  2. Step 2: Convert to fraction form
    3,954.60/5,931 = 1,489.50/x
  3. Step 3: Cross multiply
    3,954.60x = 5,931 × 1,489.50
  4. Step 4: Simplify right side
    3,954.60x = 8,834,224.50
  5. Step 5: Solve for x
    x = 8,834,224.50/3,954.60
  6. Step 6: Final answer
    x = 2,233.91

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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.