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Finding the Fourth Proportional to 1,805.46, 2,708.28 and 651.21

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Solution

The fourth proportional to 1,805.46, 2,708.28 and 651.21 is: 976.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,805.46 : 2,708.28 = 651.21 : x
  2. Step 2: Convert to fraction form
    1,805.46/2,708.28 = 651.21/x
  3. Step 3: Cross multiply
    1,805.46x = 2,708.28 × 651.21
  4. Step 4: Simplify right side
    1,805.46x = 1,763,659.02
  5. Step 5: Solve for x
    x = 1,763,659.02/1,805.46
  6. Step 6: Final answer
    x = 976.85

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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.