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Finding the Fourth Proportional to 3,969.81, 5,477.47 and 2,397.87

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Solution

The fourth proportional to 3,969.81, 5,477.47 and 2,397.87 is: 3,308.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,969.81 : 5,477.47 = 2,397.87 : x
  2. Step 2: Convert to fraction form
    3,969.81/5,477.47 = 2,397.87/x
  3. Step 3: Cross multiply
    3,969.81x = 5,477.47 × 2,397.87
  4. Step 4: Simplify right side
    3,969.81x = 13,134,254.99
  5. Step 5: Solve for x
    x = 13,134,254.99/3,969.81
  6. Step 6: Final answer
    x = 3,308.53

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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.