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Finding the Fourth Proportional to 3,100.56, 4,650.84 and 909.90

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Solution

The fourth proportional to 3,100.56, 4,650.84 and 909.90 is: 1,364.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,100.56 : 4,650.84 = 909.90 : x
  2. Step 2: Convert to fraction form
    3,100.56/4,650.84 = 909.90/x
  3. Step 3: Cross multiply
    3,100.56x = 4,650.84 × 909.90
  4. Step 4: Simplify right side
    3,100.56x = 4,231,799.32
  5. Step 5: Solve for x
    x = 4,231,799.32/3,100.56
  6. Step 6: Final answer
    x = 1,364.85

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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.