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Finding the Fourth Proportional to 2,564.89, 3,847.36 and 715.89

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Solution

The fourth proportional to 2,564.89, 3,847.36 and 715.89 is: 1,073.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,564.89 : 3,847.36 = 715.89 : x
  2. Step 2: Convert to fraction form
    2,564.89/3,847.36 = 715.89/x
  3. Step 3: Cross multiply
    2,564.89x = 3,847.36 × 715.89
  4. Step 4: Simplify right side
    2,564.89x = 2,754,286.55
  5. Step 5: Solve for x
    x = 2,754,286.55/2,564.89
  6. Step 6: Final answer
    x = 1,073.84

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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.