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Finding the Fourth Proportional to 3,808.50, 5,256.45 and 2,152.50

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Solution

The fourth proportional to 3,808.50, 5,256.45 and 2,152.50 is: 2,970.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,808.50 : 5,256.45 = 2,152.50 : x
  2. Step 2: Convert to fraction form
    3,808.50/5,256.45 = 2,152.50/x
  3. Step 3: Cross multiply
    3,808.50x = 5,256.45 × 2,152.50
  4. Step 4: Simplify right side
    3,808.50x = 11,314,508.63
  5. Step 5: Solve for x
    x = 11,314,508.63/3,808.50
  6. Step 6: Final answer
    x = 2,970.86

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.