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Finding the Fourth Proportional to 3,924.50, 5,886.76 and 1,188.50

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Solution

The fourth proportional to 3,924.50, 5,886.76 and 1,188.50 is: 1,782.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,924.50 : 5,886.76 = 1,188.50 : x
  2. Step 2: Convert to fraction form
    3,924.50/5,886.76 = 1,188.50/x
  3. Step 3: Cross multiply
    3,924.50x = 5,886.76 × 1,188.50
  4. Step 4: Simplify right side
    3,924.50x = 6,996,414.26
  5. Step 5: Solve for x
    x = 6,996,414.26/3,924.50
  6. Step 6: Final answer
    x = 1,782.75

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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.