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Finding the Fourth Proportional to 5,520.71, 7,619.72 and 3,397.29

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Solution

The fourth proportional to 5,520.71, 7,619.72 and 3,397.29 is: 4,688.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,520.71 : 7,619.72 = 3,397.29 : x
  2. Step 2: Convert to fraction form
    5,520.71/7,619.72 = 3,397.29/x
  3. Step 3: Cross multiply
    5,520.71x = 7,619.72 × 3,397.29
  4. Step 4: Simplify right side
    5,520.71x = 25,886,381.57
  5. Step 5: Solve for x
    x = 25,886,381.57/5,520.71
  6. Step 6: Final answer
    x = 4,688.96

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.