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Finding the Fourth Proportional to 2,564.64, 3,847.05 and 715.68

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Solution

The fourth proportional to 2,564.64, 3,847.05 and 715.68 is: 1,073.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,564.64 : 3,847.05 = 715.68 : x
  2. Step 2: Convert to fraction form
    2,564.64/3,847.05 = 715.68/x
  3. Step 3: Cross multiply
    2,564.64x = 3,847.05 × 715.68
  4. Step 4: Simplify right side
    2,564.64x = 2,753,256.74
  5. Step 5: Solve for x
    x = 2,753,256.74/2,564.64
  6. Step 6: Final answer
    x = 1,073.55

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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.