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Finding the Fourth Proportional to 5,120.40, 7,679.64 and 3,066

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Solution

The fourth proportional to 5,120.40, 7,679.64 and 3,066 is: 4,598.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,120.40 : 7,679.64 = 3,066 : x
  2. Step 2: Convert to fraction form
    5,120.40/7,679.64 = 3,066/x
  3. Step 3: Cross multiply
    5,120.40x = 7,679.64 × 3,066
  4. Step 4: Simplify right side
    5,120.40x = 23,545,776.24
  5. Step 5: Solve for x
    x = 23,545,776.24/5,120.40
  6. Step 6: Final answer
    x = 4,598.43

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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.