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Finding the Fourth Proportional to 5,143.50, 7,715.25 and 2,065.50

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Solution

The fourth proportional to 5,143.50, 7,715.25 and 2,065.50 is: 3,098.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,143.50 : 7,715.25 = 2,065.50 : x
  2. Step 2: Convert to fraction form
    5,143.50/7,715.25 = 2,065.50/x
  3. Step 3: Cross multiply
    5,143.50x = 7,715.25 × 2,065.50
  4. Step 4: Simplify right side
    5,143.50x = 15,935,848.88
  5. Step 5: Solve for x
    x = 15,935,848.88/5,143.50
  6. Step 6: Final answer
    x = 3,098.25

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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.