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Finding the Fourth Proportional to 1,818.53, 2,729.15 and 708.12

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Solution

The fourth proportional to 1,818.53, 2,729.15 and 708.12 is: 1,062.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,818.53 : 2,729.15 = 708.12 : x
  2. Step 2: Convert to fraction form
    1,818.53/2,729.15 = 708.12/x
  3. Step 3: Cross multiply
    1,818.53x = 2,729.15 × 708.12
  4. Step 4: Simplify right side
    1,818.53x = 1,932,564.81
  5. Step 5: Solve for x
    x = 1,932,564.81/1,818.53
  6. Step 6: Final answer
    x = 1,062.71

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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.