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Finding the Fourth Proportional to 1,366.72, 2,051.30 and 636.71

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Solution

The fourth proportional to 1,366.72, 2,051.30 and 636.71 is: 955.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,366.72 : 2,051.30 = 636.71 : x
  2. Step 2: Convert to fraction form
    1,366.72/2,051.30 = 636.71/x
  3. Step 3: Cross multiply
    1,366.72x = 2,051.30 × 636.71
  4. Step 4: Simplify right side
    1,366.72x = 1,306,074.56
  5. Step 5: Solve for x
    x = 1,306,074.56/1,366.72
  6. Step 6: Final answer
    x = 955.63

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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.