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Finding the Fourth Proportional to 1,440.68, 2,160.99 and 516.29

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Solution

The fourth proportional to 1,440.68, 2,160.99 and 516.29 is: 774.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,440.68 : 2,160.99 = 516.29 : x
  2. Step 2: Convert to fraction form
    1,440.68/2,160.99 = 516.29/x
  3. Step 3: Cross multiply
    1,440.68x = 2,160.99 × 516.29
  4. Step 4: Simplify right side
    1,440.68x = 1,115,686.72
  5. Step 5: Solve for x
    x = 1,115,686.72/1,440.68
  6. Step 6: Final answer
    x = 774.42

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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.