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Finding the Fourth Proportional to 5,188.18, 7,781.22 and 1,900.15

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Solution

The fourth proportional to 5,188.18, 7,781.22 and 1,900.15 is: 2,849.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,188.18 : 7,781.22 = 1,900.15 : x
  2. Step 2: Convert to fraction form
    5,188.18/7,781.22 = 1,900.15/x
  3. Step 3: Cross multiply
    5,188.18x = 7,781.22 × 1,900.15
  4. Step 4: Simplify right side
    5,188.18x = 14,785,465.73
  5. Step 5: Solve for x
    x = 14,785,465.73/5,188.18
  6. Step 6: Final answer
    x = 2,849.84

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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.