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Finding the Fourth Proportional to 4,708.72, 7,063.12 and 1,421.84

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Solution

The fourth proportional to 4,708.72, 7,063.12 and 1,421.84 is: 2,132.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,708.72 : 7,063.12 = 1,421.84 : x
  2. Step 2: Convert to fraction form
    4,708.72/7,063.12 = 1,421.84/x
  3. Step 3: Cross multiply
    4,708.72x = 7,063.12 × 1,421.84
  4. Step 4: Simplify right side
    4,708.72x = 10,042,626.54
  5. Step 5: Solve for x
    x = 10,042,626.54/4,708.72
  6. Step 6: Final answer
    x = 2,132.77

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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.