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Finding the Fourth Proportional to 5,165.57, 7,748.21 and 1,878.72

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Solution

The fourth proportional to 5,165.57, 7,748.21 and 1,878.72 is: 2,818.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,165.57 : 7,748.21 = 1,878.72 : x
  2. Step 2: Convert to fraction form
    5,165.57/7,748.21 = 1,878.72/x
  3. Step 3: Cross multiply
    5,165.57x = 7,748.21 × 1,878.72
  4. Step 4: Simplify right side
    5,165.57x = 14,556,707.70
  5. Step 5: Solve for x
    x = 14,556,707.70/5,165.57
  6. Step 6: Final answer
    x = 2,818.03

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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.