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Finding the Fourth Proportional to 2,172.64, 3,257.07 and 710.86

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Solution

The fourth proportional to 2,172.64, 3,257.07 and 710.86 is: 1,065.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,172.64 : 3,257.07 = 710.86 : x
  2. Step 2: Convert to fraction form
    2,172.64/3,257.07 = 710.86/x
  3. Step 3: Cross multiply
    2,172.64x = 3,257.07 × 710.86
  4. Step 4: Simplify right side
    2,172.64x = 2,315,320.78
  5. Step 5: Solve for x
    x = 2,315,320.78/2,172.64
  6. Step 6: Final answer
    x = 1,065.67

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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.