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Finding the Fourth Proportional to 5,146.89, 7,720.32 and 1,859.99

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Solution

The fourth proportional to 5,146.89, 7,720.32 and 1,859.99 is: 2,789.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,146.89 : 7,720.32 = 1,859.99 : x
  2. Step 2: Convert to fraction form
    5,146.89/7,720.32 = 1,859.99/x
  3. Step 3: Cross multiply
    5,146.89x = 7,720.32 × 1,859.99
  4. Step 4: Simplify right side
    5,146.89x = 14,359,679.40
  5. Step 5: Solve for x
    x = 14,359,679.40/5,146.89
  6. Step 6: Final answer
    x = 2,789.97

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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.