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Finding the Fourth Proportional to 4,742.86, 7,117.92 and 2,147.62

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Solution

The fourth proportional to 4,742.86, 7,117.92 and 2,147.62 is: 3,223.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,742.86 : 7,117.92 = 2,147.62 : x
  2. Step 2: Convert to fraction form
    4,742.86/7,117.92 = 2,147.62/x
  3. Step 3: Cross multiply
    4,742.86x = 7,117.92 × 2,147.62
  4. Step 4: Simplify right side
    4,742.86x = 15,286,587.35
  5. Step 5: Solve for x
    x = 15,286,587.35/4,742.86
  6. Step 6: Final answer
    x = 3,223.07

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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.